chris kolaczan

Minimum image resolution is 4MP so the 4K grabs are fine by that standard. dpi is basically irrelevant. The biggest problem is going to be with the overall quality of the 4K "image". Often alot of flaws (noise, softness, motion blur etc) are hidden in the movement of the footage. Finding a frame that is technically up to scratch (not that that is too hard these days) may be the biggest problem. Having said all that, I haven't actually tried to get footage frames accepted. I don't see a reason why it shouldn't work if the IQ is alright.

And the reviewer has no way of knowing this so they are going to err on the side of caution.

Another example. Not close to MFD. 90mm lens at f4. APS-c vs "FF" Distance to subject is 80 inches Original question: What's the difference? 300mm with full frame sensor. 300mm with 1.6 crop sensor. Both shot at f4. Use entire image from the 1.6 crop sensor and crop the full frame to match. Tell me which was FF and which was APS-c (DOF calculator information is not necessarily liked to the image it is below)

No, I'm referring to the original question that this discussion thread is referring to: What's the difference? 300mm with full frame sensor. 300mm with 1.6 crop sensor. Both shot at f4. Use entire image from the 1.6 crop sensor and crop the full frame to match. See, the problem with these sorts of discussions is that people start adding in their own assumptions (like you did below and in your initial reply) and they swithc around focal lengths and distance to subject to match framing etc. I answered the original question. Yes, you are making assumptions. The original question had to do with the same focal length lens at the same aperture setting with different sensor sizes. So, most of the above simply does not apply. Have you looked at the assumptions that your DOF calculator is based on? Do all of these assumptions apply to most situations today? Personally, I don't think so which is why I take DOF calculators with a very substantial grain of salt. Again, not really useful in answering the question the OP asked.

Remember, DOF calculators are based on some very important assumptions which may not always be appropriate.

Calculators aside, you guys can tell me which of these was obviously shot with FF and which was APS-c. Same lens, same settings, same distance to subject. Simple crop to get the same framing (not perfect, but close enough to make the point). Personally, I don't see a significant difference in DOF. Tell me what you think.

Smartphones have a combination of very small sensor AND an extremely short focal length lens. The latter is more important.

If you look at the original comment and the one I was actually referring to you can see that the same lens/aperture is used and camera to subject distance is not changing. Given that the lens settings and distances aren't changing then there is nothing the sensor can really do to change the optical image projected by the lens. I suspect that if you compare cameras with similar pixel density the differences would disappear.

Only if you are changing distance to subject to get the same framing. As presented that isn't happening. DOF difference will be negligible.

Based strictly on those parameters (i.e. not speaking about resolution etc) there will be no difference assuming that both images are taken at the same distance to the subject.

It is basically the same thing these days.

You can put your own photo into a discussion thread by 'right clicking' on the image and copying the link location and pasting that link into your comment. It will be watermarked. If you want to share a non-watermarked image you will need to use one off of your hard drive. I don't recommend sharing non-watermarked images though as you are just making it easier for image thieves. Make sure you keep your images secure as Shutterstock doesn't allow you to download your own images (not for free at least) so if you lose your copy you are out of luck.

Both. You have to designate your image as being RF or RM. I personally would save RM for images that are genuinely unique and in demand. The vast majority of my stuff is RF. RF sales can still be extremely valuable (compared to subs here).

I've had three sales there this year. Having said that, those three sales have made it worth staying there. I also need to get more images up there...

https://www.shutterstock.com/image-photo/oilsands-development-northern-alberta-93324481