Posts

PerBuch · Apr 25, 2016

Units with lithium cells are dangerous if not designed and manufactured right. They needs to be under and over voltage protected and charged the right way. Multi cell configurations needs balanced charging. Chinese manufactures don't care.

fugu82 · Apr 24, 2016

Thanks all for taking the time to clear this up for me. I didn't know diddly-squat about transmissive LCDs.

TWI by Dustin Abbott · Apr 23, 2016

andrei1989 said:
has anyone preordered this lens?
i've seen that the first ones have already started to be delivered.
i'm interested in buying this but maybe in a few months or close to black friday/christmas sales...

One will be heading my way shortly (probably after B&H returns from holidays) for review.

pwp · Apr 23, 2016

Mt Spokane Photography said:
teedidy said:

Does anyone have any advice? At this point I don't know what to do?
Thank you for your time.

Click to expand...

You should not be seeing the problem, send the lens back or in for repair. The issues of a Tamron lens have nothing to do with Canon.

Quite right. This shouldn't happen. Hope you're still in your warranty period.
Mine does not do what you've described. It's as close to a perfect zoom lens as I've ever used.

-pw

kphoto99 · Apr 23, 2016

d said:
Nado said:

Has anyone performed a dynamic range test in "stops". Curious.

Click to expand...

http://www.photonstophotos.net/Charts/PDR.htm

Interesting graph if true. The 70D is really bad with in between ISO settings, worst then any semi modern Canon DSLR going all the way back to 40D

Apr 23, 2016

dak723 said:
I realize that the sizes of the sensor are different between FF and APS-C, but if they have the same number of MPs, would you get the same level of sharpness taking hand held shots (same lens, settings, etc.) with both cameras? Or it something beyond pixel size that would make the FF shots sharper?

The FF image will appear sharper (assuming you're comparing same framing, etc.), because to compare them at the same size, you'll need to enlarge the APS-C image more. Check TDP's comparisons with the 200/2 L and crop vs. FF bodies.

JonAustin · Apr 23, 2016

Ian_of_glos said:
When you are using AV mode, by default the camera assumes that you want the background to be correctly exposed as well as your subject. If you are using ETTL then this will calculate the correct flash power so your subject is exposed correctly. The 5D mk3 then leaves the shutter open after the flash is fired until the background is correctly exposed. Personally I find this behaviour rather annoying because the shutter can remain open for a very long time, but the 5D mk 3 does allow you to set a faster shutter speed by changing the "flash sync speed in AV mode" setting. You can choose either the camera's sync speed (1/200) or a shutter speed between 1/60 and 1/200. Please note that if you use either of these options then it prevents you from using High Speed Sync on your flash - because you are not allowing the camera to use a shutter speed that is faster than 1/200. If you are using AV mode then you can only use high speed sync if you set "flash sync speed in AV mode" to auto.
Using Manual rather than AV will give you a lot more control over your exposure and you can set a shutter speed that exposes the background the way you want it to look. You can still use ETTL to expose your subject correctly.

+1

When not using flash, I find myself shooting in Av mode most of the time. But if I want to expose a dark background in Av mode with flash, I'd better be using a tripod.

I have found it's just easier to shoot in Manual mode when using flash most of the time, because you set all the variables as you want them, rather than leaving those decisions to the camera's program. The exception is when I'm shooting in bright light with flash (i.e., to prevent shadows under hats, in eye sockets, under noses); in those situations, I'll use HSS in Av mode.

GuyF · Apr 23, 2016

It's like a million macro lenses all cried out and then were silenced.

http://microsculpture.net/

sanj · Apr 23, 2016

Thank you so much. Expatinasia.

Valvebounce · Apr 23, 2016

Hi Jon, soldrinero.
If this is available in small quantities this looks like it would be ideal, easy enough to make a U to clear the filter wheel and you could incorporate 1 or more Arca Swiss quick release plates to allow quick set up and break down and micro adjustment to prevent strain.
Looking forwards to seeing some of the results on the other thread.

Cheers, Graham.

soldrinero said:
If you're building your own support, an easy way might be to use 80/20: https://www.8020.net .

d · Apr 23, 2016

Great little camera. I've still got an Olympus Trip 35 floating around somewhere with a half shot roll of film in it still. You've reminded me I should finish the roll and get it developed!

d.

expatinasia · Apr 23, 2016

GuyF said:
RAW files available here for scrutiny - https://www.ephotozine.com/article/canon-eos-1d-x-mark-ii-review-28791/performance

Thanks for sharing that link, GuyF.

One thing from that article that sticks in my mind is this:

If you are going to be recording 4K video .... a 9-second video at 50fps creates a 900MB video file

Apr 22, 2016

kphoto99 said:
Luds34 said:

dolina said:

- film lens with film optics

Click to expand...

Whoa! It's a good thing my (digital) cameras don't know any better and still accept the light and images from all my "film optic" lenses.

Click to expand...

Lens designed for film is different then a lens designed for digital. The reason for the difference is the thickness of the sensor stack. The glass in front of the sensor has an effect on light. Google "sensor stack thickness" and look at the article from LensRentals for a better explanation then I could give here.

Given that article, one would expect the same Zeiss lens to be much sharper on the Sony A3000 than on the A6000 – is that the case?

I'd also note some flawed assumptions, like theoretical MTFs based on a glass refractive index of 1.52, when any camera with an AA filter in the stack has a substantial proportion of the stack as LiNbO3 with a refractive index of 2.3.

Mt Spokane Photography · Apr 22, 2016

The issues will dribble out slowly. It seems to me to be a cultural thing. In the US, I'd be working 24/'7 to come up with answers in a few days, and have a plan to recover. I expect to continue to hear results of their investigation for months.

The simple facts are likely that the plant will be out for at least 6 months, possibly a year or more. Customers like Apple will have to go to a different supplier for the IPhone 7, and likely delay it, since the design is certainly frozen by now. Samsung may be in better shape to make their own sensors.

rfdesigner · Apr 22, 2016

Re: Patent: GPS & Wifi in Metal Bodies

Don Haines said:
rfdesigner said:

extide said:

I would guess they are using just a little 'chip antenna' so barely any gain, maybe 1-3db? At least it would be better than a pcb-trace-antenna. I would HIGHLY doubt we will see anything other than a 1x1:1 solution, meaning one antenna, no MIMO.

Click to expand...

Ill be shocked, truely truely shocked, if they're in positive territory.

and yes of course it's a single antenna.. I was just thinking as I do at work.. wondering where I might add a second antenna.

Click to expand...

We have done several flat plane MIMO antennas at work with decent gain.....unfortunately they are all bigger than a DSLR

yup that's the problem with physics... there's no Moores Law.

RGF · Apr 22, 2016

well this is a gear forum. Expect lots of gear talk here.

Beside talking about gear is fun - after many of us suffer from GAS. Gear is a common denominator here, images vary widely from BIF to the human form as art to abstract landscapes ... Much harder to talk art here,

scyrene · Apr 22, 2016

RGF said:
Just canon stuff - 65 extreme macro, 11-24, 17 TS - all run of the mill

Heh. Something in me rebels at the description of such magnificent lenses as 'run of the mill'!

mistaspeedy · Apr 21, 2016

They could let it record 10 bit video. All of their dedicated video cameras should be able to do this, and the next versions of whatever they release should really support this. Maybe they could let it use Canon Log 2 as well.
These are small tweaks that could be easily implemented in my opinion.

d · Apr 21, 2016

LDS said:
Anyway, this ends up to be expensive add-ons for devices with a short life.

Agreed.

j-nord · Apr 21, 2016

romanr74 said:
Just had my first couple of days with my EF 11-24 f/4.0. Very very happy with the lens. Actually used it as walk-around lens during a long week-end in Venice Italy. Prefer it so much over the EF 16-35 f/2.8. Yes, CA is there but much much much better than with 16-35. Corners are reasonably sharp at f/4 wide open and almost perfect at f/8 - something which is never the case with my (copy of the) 16-35. Picture below shot at 11mm, ISO 1600, f/8, 1/40s handheld.

Great image and thanks for sharing! If I lived in a large city I'd definitely be looking at this lens!

Cory · Apr 21, 2016

Not all is lost - a $5 Sensei step-up ring just arrived so I can use my 67mm filters on my 85 1.8 lens.

YellowJersey · Apr 21, 2016

I would wait for the 5D mkIV and the 6D mkII and then assess your options once all the cameras are out rather than basing a decision on speculation of how well these cameras will perform. I'd say a 5D mkIV is all but guaranteed and it's highly probably that a 6D mkII will follow, so we should see both released by this time next year.

It would really suck to spend the money on a 5Ds/r only to find the 5D mkIV and/or 6D mkII blow it away, save for resolution.

Zv · Apr 21, 2016

I don't really see CR forum as a photo sharing / viewing / critique site. The images seem to be more just samples for reference to help others decide if it's for them or not. In that way it's really useful. I'm not totally put off posting images here, just that it seems unnecessary for the most part.

Those with the 35LII or 100-400LII are probably out shooting and enjoying using their lenses. I doubt they're put off or unenthusiastic. Posting here is probably just low priority for them.

Some of the threads are quite busy, like the birds in flight etc. loads of people showing off stuff in there. Maybe the subject specific stuff is more interesting than just sample from a lens category? You get to see many points of view of the same thing which is really cool to see.

Everyone has something to offer and we can always learn something we didn't know before.

keithcooper · Apr 21, 2016

mclaren777 said:
This lens is nice, but I want the Laowa 12mm f/2.8 so bad!!

Definitely on my 'to do' list now ;-)

Ivan Muller · Apr 21, 2016

I was invited to photograph a charity initiative whereby 18 grade 1 pupils from a relatively disadvantaged school will be taught Russian Ballet.

Although it was shot and delivered in colour I thought it will look good in B&W as well...

Many more images as well as some background info can be found here: http://www.ivanmullerphotography.com/2016/04/19/a-very-worthwhile-initiative/

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