Infrared Question
Dec 14, 2019 11:45:25 #
Flickwet wrote:
Yes, focus compensation is necessary, I just looked it up
The conversion companies can adjust the focus for a specific lens. I didn't do that and shoot a lot of IR and I use a very wide lens and stop down at least a couple stops, and I haven't had a problem. Prime lenses have a mark to compensate for IR, but it's not possible with zooms.
Dec 14, 2019 11:51:29 #
Yes, it is. I've used an IR filter on my D800 and achieve IR images. No modifications needed.
--Bob
--Bob
John7199 wrote:
I recently saw an exhibit of Infrared film photos and it got me to wondering - Is Infrared possible with a DSLR? If yes How?
Dec 14, 2019 12:27:19 #
rmalarz wrote:
Yes, it is. I've used an IR filter on my D800 and achieve IR images. No modifications needed.
--Bob
--Bob
Don't you get very long exposure times?
Dec 14, 2019 12:30:03 #
ballsafire
Loc: Lafayette, Louisiana
I think that IR is used by dslr cameras for speedlites - that is as far as I know about IR. As far as using that spectrum to take pictures with is beyond me and it will stay that way! LOL
Dec 14, 2019 12:32:47 #
Dec 14, 2019 12:34:33 #
ballsafire wrote:
I think that IR is used by dslr cameras for speedlites - that is as far as I know about IR. As far as using that spectrum to take pictures with is beyond me and it will stay that way! LOL
If you go to the lifepixel.com site and look through their galleries you might be surprised at the possibilities of IR photography.
Dec 14, 2019 12:36:41 #
Frayud wrote:
Is it possible to do an Infra Red conversion/approximation with software?
Approximation is a good work for it. Fake IR is what a lot of Real IR photographers call it. I don't believe a software approximation could achieve the results I get with real IR.
Dec 14, 2019 13:17:10 #
John, generally around 10 seconds at f/5.6
--Bob
--Bob
JohnSwanda wrote:
Don't you get very long exposure times?
Dec 14, 2019 13:26:47 #
rmalarz wrote:
John, generally around 10 seconds at f/5.6
--Bob
--Bob
So you have to use a tripod. With the converted camera I can shoot handheld.
Dec 14, 2019 13:56:53 #
Personally, I don't mind using a tripod. I have little interest in modifying any of my cameras.
If I want to shoot handheld, I'll revert back to using my Sony camera with slight modification and an IR filter. That has worked quite well.
--Bob
If I want to shoot handheld, I'll revert back to using my Sony camera with slight modification and an IR filter. That has worked quite well.
--Bob
JohnSwanda wrote:
So you have to use a tripod. With the converted camera I can shoot handheld.
Dec 14, 2019 13:57:43 #
John7199 wrote:
I recently saw an exhibit of Infrared film photos and it got me to wondering - Is Infrared possible with a DSLR? If yes How?
Convert a camera, then start having fun, a whole new world will open up to you. Enjoy.
Dec 14, 2019 14:29:27 #
Flickwet wrote:
Does the auto focus of a DSLR work accurately in IR, or is focus compensation necessary?
I have 2 cameras converted. One is a Sony A55 which is an older translucent mirror type camera. It has the same focus issues as a DSLR with IR. And I need to manually focus this camera since the auto focus is always off a little bit. Since I use many lenses with it, compensation is not really an option since it would only be good for that one lens. But I must say that manually focusing this camera is very easy with the focus magnifier.
And I have an Olympus mirrorless converted, an EM5ii. Since it is mirrorless, all the auto focus lenses that I use on it focus perfectly without any need for compensation.
As for hot spots, I really only have one lens that I have seen a hot spot and that is a Sony kit lens, the 18-55mm. And then only when stopped down.
I have many Minolta lenses for the A55, and not hot spots with any of them. And all the Olympus lenses I have, I have not encountered a hot spot.
Dec 14, 2019 14:37:56 #
JohnSwanda wrote:
Approximation is a good work for it. Fake IR is what a lot of Real IR photographers call it. I don't believe a software approximation could achieve the results I get with real IR.
Very true! Totally agree.
Consider these two images taken towards the end of 2018 when we had all the fires in California. First image is using an unmodified Olympus EM1. Couldn't even auto focus because of the lack of contrast from the smoke.
Second image, using the same lens, but this time on a modified, full spectrum EM5ii with a 720nm filter. This time, auto focus had no issues whatsoever. Notice how the longer wavelength light cuts through the smoke.
No fake IR software is going to make this one work.
Dec 14, 2019 16:06:26 #
Yeah I have a converted EM-5 and love it, I’d love a full frame but the mtf gives me gorgeous 11x17’s on 13x19 paper. I had thought about a converted DSLR but my concerns proved correct, although an additional Focus filter will correct most dslrs mirrorless seems the way to go
Dec 14, 2019 16:07:16 #
If you want to reply, then register here. Registration is free and your account is created instantly, so you can post right away.