Posts

msowsun · Apr 14, 2014

Mt Spokane Photography said:
You can use the same adapter that you use to mount the lens to the camera. don't expect too much, unless its a high end lens, it will not be as good as a cheap EF lens, and the TC will bring it down a big notch.

As to infinity focus using a TC, I don't know if its a issue or not.

You can't use the same adapter that he has now. He has an adapter for mounting an FD lens on a EF body. What he needs now is an adapter to mount an EF lens to a FD body. That is the exact opposite.

No one has ever made one, and no one ever will, because it would be impossible to change the aperture.

kalieaire · Apr 14, 2014

This means nothing to me until they make some large aperture primes, large constant aperture zooms, or a speedbooster that allows me to use my EF lenses at the right perspective.

Apr 14, 2014

Bryan seems to think so…

http://www.the-digital-picture.com/Reviews/Canon-EF-24mm-f-1.4-L-II-USM-Lens-Review.aspx

scyrene · Apr 14, 2014

jrista said:
scyrene said:

jrista said:

Excluding telescopes, I've used the EF 600/4 L II with both 2x and 1.4x TCs (a Kenko in this case, as they stack directly without the need for an extension tube...IQ suffers a little bit). That gets you to 1680mm.

With telescopes, I've poked around with focal lengths up to around 8000mm to 10,000mm using SCT and RC type OTAs with barlow lenses. The only real reason you would use such focal lengths is for planetary (to get any real kind of sharp detail on planets, you need at least 8000mm), solar (sunspot closeups) and lunar (individual craters and finer surface detail).

I haven't purchased my own OTA yet, once I do, I really can't wait to do planetary imaging at over 8000mm.

Click to expand...

How do telescope focal lengths relate to sensor size? Like, is 8000mm an equivalent in full frame lens terms?

Click to expand...

Well, it depends on the scope. When it comes to the popular SCTs (like Celestron EdgeHD and the Meade Aplantics) and RCs, they are usually designed to cover at least the 42mm diagonal of a 35mm sensor frame. But when it comes to telescopes in general, they have a pretty wide range of image circle sizes. If you attach focal reducers, that affects the amount of backfocus, which in turn usually has an impact on image circle size. It seems to be a general standard that your average refractors (which often need at least a field flattener, if not a full focal reducer, to get a flat field) support a 22mm image circle. That is for fairly small sensors, which are more common in astrophotography CCD imagers. APS-C sized sensors are usually supported "natively" without focal reducers usually (~27mm diagonal.)

Larger scopes, as well as the new Rowe-Ackermann Schmidt Astrograph from Celestron, support image circles from 50mm up to 70mm. The larger scopes are ultimately designed to be used with both full-frame (36x24mm) and square full frame (37x37mm or larger, usually 4096x4096 pixels) CCD sensors. The 37x37mm sensors have a 52mm diagonal. There are some newer, larger sensors coming on the market soon that will have around a 65mm diagonal, and the ultimate top of the line is expected to be around 70mm in the future. Kodak is primarily the manufacturer supplying either FF or large square sensors, with 9µm, 11µm, and 24µm pixels. Sony has entered the market as well, and is supplying some of the highest sensitivity (highest Q.E.) small sensors (up to 22mm) that are often used in autoguiding cameras (ultra high sensitivity, configurable frame rate video cameras that are very similar to webcams, basically.) Some Sony sensors have found their way into entry-level Atik CCD cameras. Aptina also supplies 22mm and APS-C sized sensors.

There really isn't a standard sensor size that is supported by telescopes. Most support the 22mm and APS-C sensor diagonals. Larger OTAs usually support 35mm full frame. Outside of Celestrons new RASC Astrograph (which produces a 70mm image circle and costs a mere $3400), you usually have to buy either an RC Optical Systems or PlaneWave truss to get a 65mm (RCOS) or 70mm (PlaneWave) image circle...and those puppies cost tens of thousands of dollars.

Eek... I suppose what I meant was, is 8000mm in telescope terms the same as, say, a lens with attached teleconverters amounting to a 8000mm focal length? Would a planet be magnified the same amount by both?

StudentOfLight · Apr 14, 2014

You haven't mentioned what body/bodies you shoot with and what kind of subject matter you generally shoot.

I would only really consider the 50L if you are shooting full frame. On APS-C the the 50L lens will essentially have "the look" of lens that is 80mm f/1.9 on full frame. To get the most out of it you'll need to be shooting full frame as then you can get relatively closer to your subject to really melt away the background when shooting at f/1.2.

I have a feeling that the 50L is one of those lenses that will lose some value when a new version is released. There is significant room for improvement and strong competition in terms of IQ and price.

Mt Spokane Photography · Apr 13, 2014

I have the 70-200 MK II, the 100L, and 135L.

Since getting the 70-200, my 135L is going from my most used lens to least used. Its a wonderful lens, and I get beautiful results with it, but with the high ISO 5D MK III, I am able to use the f/2.8 zoom, and it is versatile.

g-spot · Apr 13, 2014

Hi thanks for the replies!

As a planespotter I'm using 50D's and 70-300 IS L + 400 L non IS, so enough mm's there.

I want to use my current 18-55 non IS lens on a back-up 400D for some family-pics, and that's it.
This means my new 'smaller' lens needs to serve for photo's of static/expo and some taxyshots of planes. For this 55mm is fine, but a bit more is better. IS is a must

Therefore my budget is limited to approx. 200€.

Gert.

Apr 13, 2014

Using a batch renamer app after copying the files off the card opens up many possibilities. I organize files in Aperture by date, and and with geotagging and face detection I can easily find images I want.

privatebydesign · Apr 13, 2014

StudentOfLight said:
privatebydesign said:

StudentOfLight said:

Do you have a guide number chart for the Phottix Mitros+? I can't seem to find one online either for the Mitros or Mitros+. Canon's 600ex-RT has a table of guide numbers for each zoom setting in the user manual.

Click to expand...

58 @ 105mm, it is the same as the 600, you can use the same GN at the same zoom setting.

Click to expand...

I know the listed (on B&H et al.) is 58@105mm, I wanted to know if Phottix provides a guide number chart for all their zoom settings.

Also, it has been suggested that the Phottix Mitros flash is less powerful than its claimed specs (https://www.youtube.com/watch?v=QRg89Mqtdfw) and was wondering if this also been the case in your experience or is the Mitros+ an improvement in this regard.

O

Well if it is the same power at one setting common sense would dictate it is the same at others. Don't forget all these speedlite gn values are dependent on zoom, which is an anomaly as that then dictates an area of coverage that changes, the 600's even have a coverage adjustment in the custom functions, but that doesn't alter the actual light comming out of the flash.

If you want to look into the differences between specs and one individuals actual flash you need to use caution, specs tend to be very specific, but, it is very easy to measure yourself in post. I strongly suspect they are using the same flash tube and same spec though different quality capacitors and IGBT circuits.

Don Haines · Apr 12, 2014

Go for a 70D, a video light, and if you want sound, either a good external sound recorder or a decent mike for the camera.

Yes, the 6D will outperform the 70D in very poor light, but with either camera you need lighting.... so the difference evaporates.

Peer · Apr 12, 2014

that1guyy said:
Is Canon not announcing anything at NAB? This is embarrassing.

It might be their new "strategy", the same way Apple didn't announce any new products at this year's MacWorld. Quite surprising.

-- peer

Eldar · Apr 12, 2014

Most seem to be said already, so all I can do is confirm some of the earlier posts. The 17 TS-E is optically and mechanically a phenomenal lens. But in my view, you buy it for the tilt&shift functionality and on a tripod. It is clearly useable handheld also, but to make it work handheld with tilt and/or shift requires a lot of practice. My use is 99% on a tripod.

There are filter options available, but to me it is too cumbersome, so I shoot it as it comes. I have a 15mm Zeiss, for which I bought the (frightfully expensive) CPL. And if a more standard UWA lens is what you want, I can definitely recommend that. Other alternative is the 21 or 18mm Zeiss lenses.

I also agree with he who pointed out that if you have a good UWA prime and the 24-70 II, you don´t need the 16-35 II. I actually sold mine, with no regrets. It is good stopped down, but full of flaws shot wide open (which is what I normally do).

But if you take the time it takes to master the 17 TS-E, it will give you lots of joy!

Lawliet · Apr 12, 2014

mkabi said:
not for handheld, steadycam stuff. I can't even imagine it on a crane....

Its highly modular - with that large cine-zoom and all the potentially useful external stuff it gets huge. But so would a A7.
The camera itself plus a photo-prime, w/o external monitoring&remote control(or that on a long tether) and you're back in the man portable ballpark. How global shutter for movement vs. higher payload capacity turns out for drone usage might be interesting, at least for 1080, in 2160 its much closer again.

CarlTN · Apr 12, 2014

Not tried either yet, but plan to buy the Rokinon/Samyang in the near future. For its budget price, there just is nothing else to consider.

I've heard and read good things about the Sigma zoom, but it is 3x the price of the Rokinon, and has slower aperture. However, besides zoom, you get autofocus and aperture set in camera, so that's a major plus. If you are shooting long exposure on a tripod, or otherwise have control of the lighting (or you're using strobes or other lights)...then wide aperture is less important. It would be very important though, if you prefer hand-holding, and shooting in a dark room.

12mm is certainly much wider than 14mm. Whether or not you can make use of the "rectilinear projection"...which basically looks like distortion...is another matter. There are ways to correct it manually in photoshop, but you wind up with an image that has less pixels, and takes in less of an angle of view. 14mm also shows significant rectilinear projection. Your straight lines will be straight, but objects (such as people, or anything round) get stretched toward the borders and corners...becoming "fat" or "egg-shaped". Certainly there is aesthetic appeal to leaving this uncorrected...but not always.

There's even a bit of this at 24mm...but it's far less necessary to correct.

scyrene · Apr 11, 2014

Jim Saunders said:
scyrene said:

edit: I notice I'm in a minority here. Without wanting to hijack the thread, what are people using the remote release for? I must be missing something

Click to expand...

I have used one for bulb for fireworks. There are no doubt other ways of doing that but that has worked for me.

Jim

Oh sure, they're pretty much essential for that. But it's a pretty minor pursuit...

Jason Montalvo · Apr 11, 2014

Check out this little guy, The image resolution is pretty astonishing given its price. I am still however, loyal to my 5D MK III

I think the Pocket Cam will make for a perfect B cam.

https://vimeo.com/89843173

Drizzt321 · Apr 11, 2014

Nice! Thanks for sharing. When I saw it, I thought seriously about backing it...but decided I should do something else with the money.

AlanF · Apr 11, 2014

eli452 said:
Did not try it, but a short search on eBay brought "Touch up paint for Canon Lenses - "L" Series Ultrasonic Versions" http://www.ebay.com/itm/Touch-up-paint-for-Canon-Lenses-L-Series-Ultrasonic-Versions-/190846327452?pt=LH_DefaultDomain_0&hash=item2c6f53da9c state that the paint fits the 300mm.
Also has Canon black.

The paint is a match for the older lenses and not for the 300/2.8 series II that the OP has.

Rienzphotoz · Apr 11, 2014

Sony just released this video today, showing high ISO performance of this camera

mango81 · Apr 11, 2014

Yeah I might end up keeping both for a while. Thanks for comenting Wickidwombat.

CarlTN · Apr 11, 2014

jeffa4444 said:
CarlTN
I never said the AF on the 6d is awful if you look I own one myself. Compared to the C300 or C500 the video IS awful compared to most other DSLRs its not.

The 6d has had a lot of very critical reviews most of them comparing it to the 5dMKIII why? The two are very different cameras and that was not a mistake of Canon it was addressing two different market segments and for its price the IQ of the Canon 6d is beyond reproach and comparable to the 5dMKIII in stills which is all Im interested in.

Fair enough, and I agree. Why does it get compared to the 5D3? Well, because it costs less, yet has less noise...and that drives some people nuts. It's kind of like if a Jetta gets better gas mileage than a Lambo Countach with malfunctioning Webber carburetors. The Lambo is still faster, has more flash and pizazz, costs a ton more...has more bragging rights. But if you're suddenly in a group of "greenies", the Lambo owner isn't going to like their criticism about its poor gas mileage...as he simply must be adored by EVERYONE in order to feel adequate. Similar to the "peacock" syndrome exhibited by country hicks who buy a new red pickup truck every six months, who enjoy tail-gaiting, but never quite having the cojones to attempt passing the traffic in front of them. When that traffic taps their brakes to say "step off my butt, follow at a safe distance"...well then it's on! I digress, but you get the point.

blanddragon · Apr 10, 2014

Yup same here. Leave work to get home to a note. Three times. Finally wised up and has it sent to the store too. Works much better.

distant.star · Apr 10, 2014

.
http://www.cpsc.gov/en/Recalls/2014/Canon-Recalls-to-Repair-Powershot-SX50-HS-Digital-Cameras/

Tiosabas · Apr 10, 2014

expatinasia said:
Mr_Canuck said:

Really, really important!!! I was regularly texting or emailing photos to my extended family back in Canada each day. They became part of the experience in a good way. It was seamless and instantaneous with the camera/phone integration.

Click to expand...

You are absolutely right, there is a massive market for this. Just look at the Nokia Lumia and Samsung models. I have no idea how the three compare to an IQ perspective, but there is going to be a lot more cameras with phones attached than not in the future.

Yeah, consider the size of a 3G/4G dongle, they can be made pretty tiny. They could be integrated into a DSLR with a SIM card slot. Altough you would need to pay for the data.

StudentOfLight · Apr 10, 2014

dcm said:
StudentOfLight said:

Here are a few lenses that I think you should consider:

...

Samyang has just announced a 12mm f/2 so it might be worth waiting to see if it's good before deciding on going for the 16mm f/2.

Click to expand...

The Samyang 12mm f/2 is only for mirrorless (EF-M) so it won't work with the 70D,
http://www.syopt.com/en/camera/photo-lenses-12mm-F2.0-NCS-CS.php

There is a Samyang 10mm f/2.8 for APS-C dSLRs if you want to go wider than 16mm,
http://www.syopt.com/en/camera/photo-lenses-10mm-F2.8-ED-AS-NCS-CS.php

Apologies, didn't pick up on the EF-M.

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