March 04, 2015, 02:04:18 AM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - grahamclarkphoto

Pages: 1 [2] 3 4 ... 7
Reviews / Re: Canon 6D Review: 1+ Year Hands-On [video review]
« on: September 24, 2014, 05:33:04 PM »
Hey guys, I just wanted to update this thread as I wanted to share with you an image captured on the 6D with Canon's newest ultra-wide angle zoom - the Canon 16-35mm F4 IS. It's a great example of how the 6D performs on this new, critically sharp ultra-wide angle zoom.

Download the RAW .CR2:  (20.37MB)
Click here to download the processed .TIFF: (111.18MB) 
Click here to download the hi-res JPEG:  (6.91MB)

The reason why I like this file is that it really showcases the shadow detail performance of the 6D, and it's ability to retain excellent definition and detail in areas such as the lower right quadrant of this photograph. Such small and fine details are often muddy on other cameras.

180s  -  F18  -  ISO 50  -  16mm  -  Canon 6D with Canon 16-35 F4

The 6D's dynamic range is 11.5 stops, and this scene, I estimated to be between 20 and 22 stops between the seastack rock thing and the sky. I used a 6-stop circular ND to push the exposure out, and a 3-stop and 2-stop GND to balance the exposure difference and bring the 6D's native dynamic range closer to what the scene presented me with. All in all, I love how the sensor handled the colors and dynamic range.

This area of extreme detail is often rendered muddy on other cameras, but the 6D has done a great job at delivering the details clear and sharp.

Shadow detail on the top right quadrant here is excellent. Check out the RAW file and experiment with the shadow detail. I also love how the bird on the distant ridge is captured with great detail here.

For those who are landscape photographers, check out the review I recently published on the 16-35 F4. I was writing this for EOS Magazine, so half or so of the images I captured with this lens as part of the review were done on the Canon 6D, and I uploaded 35.7GB of images so there's quite a few more over at the review.

Canon 16-35 F4 Review:

If you have any questions let me know! Thanks for reading.


Lenses / Re: Canon FL 50mm 1.8 on Sony A7R Results (1964-1971)
« on: February 23, 2014, 03:01:40 AM »
Today I shot Chinatown in Black and White here in San Francisco. From the 600 images (29.52GB), below are the top selects. The first half are with the Canon FL 50mm 1.8, second half are with the Canon FD 50mm 1.8:

Streets of Chinatown in B&W  |  1/320  -  F8  -  ISO 125  -  Canon FD 50mm 1.8 with Sony A7R

Serve Yourself  |  1/640  -  F8  -  ISO 320  -  Canon FD 50mm 1.8 with Sony A7R

Looking East  |  1/250  -  F8  -  ISO 200  -  Canon FL 50mm 1.8 with Sony A7R

Click here to see all the other images

Click here to view and download the RAW, TIFF, DNG and hi-res JPEG files (5.2GB)

Click here to view the astounding sharpness of the Canon FD 50mm 1.8 with the Sony A7R. Can you spot the photographer?

Lenses / Canon FL 50mm 1.8 on Sony A7R Results (1964-1971)
« on: February 22, 2014, 03:42:16 AM »
One of the most exciting things about a camera that has a short focal flange distance is that nearly any 35mm lens ever made will work. I decided to start out by trying my Canon FL, Canon FD and Nikon Kogaku lenses first, and my first results with my Canon FL 50mm 1.8 was astounding at this medium format resolution range. Note all the images below are unsharpened RAW.

Take a look:

San Francisco Skyline from Treasure Island  |  97s  -  F11  -  ISO 80  |  Canon FL 50mm 1.8 (1964 – 1971)

Take a look at the 100% crop of the bridge detail:

Take a look for yourself and download the RAW file (.ARW), the original TIFF16BIT (200MB+) and the hi/low-res JPEGs directly by clicking here:

There's a bit of flare here on the originals that you may not find on modern lenses, however my real interest in these lenses will be black and white street photography, not landscape. Just wanted to test these on something of such extreme detail before my street photography photography meetup tomorrow in San Francisco's Chinatown.

Huge win on sharpness and corner detail, completely shocked me even on playback of image on the camera, but even more so on a 27" Thunderbolt. Will post back here with images from the Streets of Chinatown in B&W ( tomorrow sometime.


Lenses / Re: Canon EF on Sony A7R field notes
« on: February 17, 2014, 04:04:53 PM »

Rodeo Beach Sunset  |  276s  F22  ISO 50  17mm
Download the .ARW and .TIFF files here here:

Lenses / Re: Canon EF on Sony A7R field notes
« on: February 04, 2014, 02:59:48 AM »
Thanks for the extensive look at the A7r; I rented one for a week and really enjoyed shooting with it, but since I was working a lot I couldn't test it out as much as I wanted.  I did have one question for you, regarding what you said here:

- You can’t charge the battery while you’re out shooting (unless you buy the standalone battery charger), but you can charge it in the car etc., so it’s a bit of a convenience tradeoff

Do you mean that you can't charge it from a practical standpoint, due to lack of power outlets, or do you mean the camera won't even allow it?  I have a number of portable battery chargers with USB outlets, mean for charging phones, tablets etc. when you're out on the go.  I was wondering if you could shoot and charge it simultaneously; one of my chargers has a loop and could hang from the hook under my tripod (although I have heard that simultaneously using a battery and charging it isn't generally good for some types of rechargeable batteries).

You wouldn't be able to use that port for the wired remote trigger, but if it worked, you could use wifi app or download the timelapse app from the Sony store, for example.


The charger is a USB cable only, no separate standalone power adapter... unless I didn't see it in the box somehow :)


Lenses / Re: Canon EF on Sony A7R field notes
« on: February 03, 2014, 11:27:11 PM »
I have completed a Sony A7R + Canon EF 17-40mm F4 L ISO range test, from ISO 100 to ISO 25,600: (390MB)

In addition I have uploaded Canon EF 70-200mm F4 IS L + Sony A7R AVCHD video converted to H264: (121MB)

Lenses / Re: Canon EF on Sony A7R field notes
« on: February 03, 2014, 07:55:38 PM »

San Francisco Sunrise  |  274s  |  F22  |  ISO 50  |  22mm  |  Sony A7R + Canon EF 17-40mm F4 L

Download the RAW .ARW here:
Download the .TIFF here:
Download both here:


- Images of out of camera on the A7R are consistently critically sharp on my Canon EF L lenses
- A7R LCD drop in frames per second occurs consistently when at ISO 25,600 with a dark foreground plus a ND
- The A7R control layout is comfortable
- A7R Autofocus takes about 3-5 seconds in daylight when wide open at 1.2/1.8/2.8
- Manual focusing through the EVF with focus peaking is faster than autofocusing if the ring dampening is good. Lenses that have plastic / electronic focusing rings are a bit tricker, such as the Canon 1.8 and Canon 40 2.8
- Autofocus and power-on with the A7R is noticeably more sluggish than the SLR counterparts
- The A7R LCD always has numbers of some kind on it: F-stop, shutter etc. You are unable to view image or video only like on the Canon Live View. A bit disappointing as sometimes I want to see just the image in live view and nothing else
- Color rendition, sharpness and dynamic range are impressive on the A7R
- I love the exposure compensation dial, very useful for when in Aperture priority mode
- Haven’t experienced any issues with any EF lenses. AF, image stabilization and lens data is passed through the EF adapter, with the exception of the model name (17-40mm F4 instead of Canon 17-40mm F4)

Lenses / Re: Canon EF on Sony A7R field notes
« on: February 03, 2014, 01:48:50 AM »
Thanks for sharing your notes and observations Graham.


Lenses / Re: Canon EF on Sony A7R field notes
« on: February 03, 2014, 01:47:19 AM »
i too have been using an a7r with a metabones adapter and canon lenses.

So far i've been very impressed. Focusing is slow but not as slow as i expected. it takes about 1 sec to 2 sec to get a focus lock.. not good enough for action shots but perfectly fine for portraits or landscapes. i havent had much time to take really good shots.. but here is one with the 16-35mm L lens.

as for camera handling.. it "feels" very different from my 5dmkIII.. battery life is pretty terrible.. you get about 300 shots per battery.. its small and light.. buttons and dials are nice.. but very different from canons interface.. HDR is a pain, without the option to take 3 consecutive bracketed shots quickly, you have to press the shutter each time. filesize for raw is surprisingly small for being 36mp.

VERY loud shutter, but i kind of like it..

Hey Darrell,

Exactly, about 300 shots or so per battery. That's an easy way to summarize it : )

I also like the shutter. I've yet to do tests to determine shutter vibration, but will soon.

I think the focusing on the A7R is comparable to the Canon Live View AF - that is to say it's excellent but not as good as non-live view


Lenses / Re: Canon EF on Sony A7R field notes
« on: February 03, 2014, 01:45:37 AM »
Is the first image straight out of the camera?
Is the second image straight out of the camera?
Or is the first image post-processed from the second image?

first image is from A7R with Canon 70-200mm F4 IS L, second is taken from iPhone 5 just to show the black LCD

download the TIFF plus the .ARW RAW file here:

Lenses / Canon EF on Sony A7R field notes
« on: February 02, 2014, 05:54:49 PM »
Hey everyone,

I got the Sony A7R, and although I usually keep quite a few notes and the consolidate and organize them into a review. I thought I'd do something a bit different and just do a stream of consciousness field notes type thing.

Update! I have just completed a video review of the Sony A7R which can be found here:

Click here for this updated field notes page on my site
Click here to view and download .TIFF + .ARW

Here's what I got so far:

-Smallness and lightness are very noticeable when compared to Canon 6D
- A7R body-only weighs 16.75 oz
- Canon 6D body-only weighs 27.75 oz
- Sony A7R with EF + Canon 17-40 weighs 38.05 oz
- Canon 40mm 2.8 weighs 4.40 oz
- Canon EF to Sony adapter weighs 5.25 oz
- The default settings on the A7R are pretty bad
- The Sony A7R manual wasn’t created for humans to understand
- With the Canon EF to Sony A7R E-Mount adapter it has a pretty good balance.
- When placed on a level surface its level on both sides with the Canon 17-40
- EVF is slightly distorted at edges of viewfinder with 20mm or wider
- EVF resolution is pretty low considering how close the eye is to the internal screen. I suppose I’m used to my retina iPhone, iPad and macbook pro, so the low-res is pretty darn -noticeable.
- Back LCD screen resolution is excellent
- Back LCD surface is delicate, much more delicate than the Canon 5D3 or 6D
- Back LCD responds with bruising if you press on it gently, it doesn’t have a hard plastic surface. Kind of like a calculator LCD display : (
- ISO 25k isn’t enough for composing in lowlight about 1/2 hour after sunset
- ISO 25k isn't enough for composing during sunset with lowlight + 6-stops ND (viewfinder is black)
- When at ISO 25k the back LCD lags down to about 10-15 fps. It may have to do with the funny named processor not being able to handle two tasks: ISO 25k and transferring data from sensor to LCD

- When playing back images on the LCD there's a significant amount of banding happening. I would imagine it's either due to the gamut of the LCD can't handle the range of colors, or the JPEG that's being processed for playback is of low quality, or both
- I'm still seeing a consistent drop in FPS when ISO 25k is used in low light
- Industrial design of the A7R is incredible. I was shooting the SF skyline last night from Treasure Island and a South Korean tourist had a 35mm rangefinder from the 70's, and it was striking the resemblance of the two
- The button placements are excellent
- The index and thumb dials are metal, very good quality and have excellent dampening
- I shoot in Aperture priority mode about 80% of the time when not in bulb, so the exposure compensation dial is fantastic. I love the feel of it, and it's very sturdy and not easy to inadvertently change. Sony intentionally dampened that one more than the others
- The power on sequence takes 3-4 seconds, not the 2 1/2 I've been reading
- The tiny little Sony batteries don't last that long. I shot for about 4 1/2 hours on the pacific ocean for sunset and the battery was nearly exhausted
- When exposing the LCD turns black, but it's still powered on and the pixels are therefore using power:

- I find the autofocus speed of the A7R to be the same as the 5D3/6D
- Canon Image stabilization with the A7R EF adapter works perfectly, I’m not noticing any issues or reduction of stops
- On the A7R the autofocus switch must be set to ‘M’ manual for the camera to engage manual focus mode. If it’s in AF it won’t do both like a Canon behaves
- The EF adapter writes focal range and F-stop into the EXIF data of the image but lacks the model information (easy fix in Aperture/Lightroom):

- Auto white balance does a great job at determining natural light, it’s a bit orangish in indoor artificial light I’ve found
- Using the EVF for achieving critical sharpness could be a game changer. The precision of manual focus is magnitudes better than looking at the viewfinder, perhaps because your eye adjusts to the dark - EVF and is able to see the screen much closer. With lenses where the threshold of focus is very small this becomes a big advantage
- For me, the Sony A7R has proven that you can drastically simplify the controls and dials and still have an effective tool for getting the job done, primarily through excellent function and custom button customizations
- Having ISO 50, 64 and 80 are great, I love the flexibility in this range. These are of course pulled from ISO 100 and the highlight headroom may *be less, but I’m going to test that soon
- The Menu button is justified in the top left, it would have been nice to have it justified to the right. If it was on the right all the controls would be accessible from the shooting hand
- The vertical swivel of the A7R is useful in certain applications, however it means it’s a more delicate camera. Getting that thing snagged on something and broken off wouldn’t be fun
- I like the record button on the right side of the grip. In the settings you can specify it to do nothing unless movie mode is selected, thereby removing the possibility of accidentally switching in to movie mode, but I don’t see that happening as it’s out of the way in its current position
- The SD card slot door is built very well and has rubberized contacts on the interior to prevent play or flex
- Audio inputs on the A7R like microphones is very easy to setup. It auto-detects and the audio level display is better than the Canon one – easier to view and a bit more polished. Downstream tech from Sony’s camcorders most likely
- The shutter button has a very gratifying quality to it, very circular and 50′s rangefinderish, but it’s also very responsive to half and full shutter clicks
- A7R magnesium alloy body is incredibly sturdy and feels well crafted
- A7R menu system is decent. I think it’s probably the best i’ve seen but then again it doesn’t really have much competition as nearly no one out there is making decent menu systems (or at least I haven’t seen one yet)
- Trash button doubles as a C3 customizable button when not selected in image playback – nice
- You can tell a user experience team thought about how the buttons should be laid out and placed, which is nice
- Achieving critical sharpness on the A7R 7x and 14.4x modes is great, although I wish the photographer could select the default magnification level instead of cycling through 0x – 7x – 14x
- A7R battery charger does not include a wall charger, you must plug the camera physically into the charger
- On the upside, the A7R charging system is done through micro-USB, so if you lose the cable / charger you can re-use another that you have
- You can charge your A7R in the car USB outlet
- A7R battery charging times are between 4-6 hours, pretty darn long considering how fast the batteries deplete
- You can’t charge the battery while you’re out shooting (unless you buy the standalone battery charger), but you can charge it in the car etc., so it’s a bit of a convenience tradeoff

Reviews / Re: Canon 6D Review: 1+ Year Hands-On [video review]
« on: January 29, 2014, 08:56:12 PM »
Graham, do you know if that -3EV exists if for example I'm using my 24-105 f/4 lens, or is that only for faster lenses? The lack of cross type focus points have been so denigrated that I find myself sub-consciously only using the center point. (focus, lock, recompose). It will be funny to learn that for me, the center point isn't anymore accurate than the others.

Hey Badger, sorry for the late response! Was in Yosemite shooting.

-3EV is for the camera body, irregardless of lens used.

Reviews / Re: Canon 6D Review: 1+ Year Hands-On [video review]
« on: January 22, 2014, 10:31:15 PM »
Can anybody submit a nice picture that did require this -3EV capability?

In response to this:

The autofocus determines the correct focus through contrast of edges, and when there's not enough light transmitted through the lens (TTL) the autofocus can't lock. Most cameras have the ability to autofocus above 0EV up to around +20EV, so in very bright conditions.

But focusing in the other direction determines at which point the camera fails to obtain a lock with a negative EV, or in lower light.

Most cameras are around 0EV (a7R), -1EV (D600), and -2EV (5D3 & D800E). The lower the EV the more accurate the camera can obtain a lock in low light. Low light could mean it's dark out, or you have an ND filter and it's daytime.

The 6Ds -3EV doesn't have much real world applicability in my opinion outside of using ND filters. For example right now I have a 6-stop ND filter stuck on the end of my GND adapter ring. So I'm constantly working with a dark viewfinder (until I get the thing unstuck or buy another adapter ring :| ) and the -3EV does have a noticeable effect - 1 stop greater for autofocus than my D800E or 5D3.

So it's an incredibly small thing that has a narrow benefit for some photographers, but it's not that big of a deal in and of itself (in my opinion).


Reviews / Re: Canon 6D Review: 1+ Year Hands-On [video review]
« on: January 22, 2014, 10:23:44 PM »
There's several highlight blow outs in some of the sky images and why is the sky darker than the land / foreground...looks like to strong grad filters too me. Nice colours, but some of the scenes look like there's false colours added from the ND grads colour casts. The scenes are nice and dramatic, but many of these would fail RPS judging (or degree level photography portfolio judging) due to the exposure issues I've just mentioned. There's bad flare in one shot and another has split boulders in the fore ground, it's important not to split any in half at the edges of the frame. These are very nice and colourfull images, i'm sure they sell well to punters. Especially to the framed print crowds, but really wouldn't impress anyone with a qualification in photography.

I almost forgot to ask, what's your website URL?

GMC has some wonderful images here:

Actually, I understand what GMC is saying. Your ND and grad filters are causing color shifts. You may want to consider changing to more expensive filters, if you so desire. ;D Now, having said that, photography is an art... so there is no rule why color shifts are bad... that is why some deliberately choose to use the 'wrong' white balance and others are able to produce colored IR images (just saw a whole article devoted to that in Landscape Photographer)...

I saw his work, and I think we're operating on different levels so conversations such as these get pretty subjective pretty darn fast :)

I'm a complete beginner, still learning the fundamentals here. I'm still 10 years out until I'm even a decent photographer, let alone intermediate.

As for color shifts, send me a private message with the images you see that on, I'd be curious to see what you're referring to! The filters I own are the most color neutral I could find. By the way, do you know what filters I'm using? :)


Reviews / Re: Canon 6D Review: 1+ Year Hands-On [video review]
« on: January 22, 2014, 10:20:30 PM »

Hey George,

In my opinion the 5D2 and the 6D are very similar:

- essentially same image quality/sensor
- essentially same AF system

The advantages that I see (owning all 5D-cameras) is small size and GPS.

For the case, I'd recommend getting optech wraps to maintain the smallest and lightest setup:

I appreciate your response Graham. I will defintely agree with you that for many real-life purposes image quality and AF performance of these cameras are very similar indeed.

Wouldn't you agree, though, that in high-ISO situations the 6d offers superior performance in terms of color rendition (saturation holds up very well) and noise (color noise, cleaner shadows & banding) in the RAW files? And that the performance gap is even greater for the corresponding out-of-camera JPGs?

My experience is that with the 6d you can select the desired (and most appropriate) depth of field and/or exposure time that will require a high ISO setting but without the image degradation penalty of the 5d mk2.

On the one hand, I hope I find you in agreement, otherwise I simply don't get it  :-[
On the other hand, if you don't agree I have a lot to learn about image interpretation and processing. Learning new stuff is always good  ;)

Last but not least, thanks for suggesting the camera wrap. I will take a closer look.


Sure, the DIGIC 5+ expands the high ISOs, but all the ISOs below 6400 are the same, and personally I never shoot 200 or above for anything serious (80% on ISO 50, 20% ISO 100). I do think that high ISOs come into play for live view manual focus, so I do find the higher ISOs useful even though I'm never shooting on them.

The DIGIC 5+ in-camera profiles that attempt to reduce axial and lateral CA only apply to JPEGs, but in my tests I find that utterly useless and in fact no visible change. Could be that it's improved in the future in the form of firmware updates, but until then it's marketing.

In my experience printing large format prints I'm seeing the same quality between my original 5D, 5D2, 5D3, 6D and 800e. I'm getting the a7R soon, and even with the large MP count I don't think the quality will be that much higher than my 350D 8.2MP sensor from 7 years ago.

Lots of people like to argue on these points of quality, but in my tests with professional printers at 40x60 we can't tell the difference and we're incredibly discerning.


Pages: 1 [2] 3 4 ... 7