Can D7D do IR?

[tokrot]

Anyone did that b4? Would like to try out.

[Drudkh]

I did try but the 4 corners look funny, which I think that light went through the VF although I put on the VF cap. I don't know how to take IR, so can't really show any good pics.

[teerex]

Originally Posted by tokrot Anyone did that b4? Would like to try out.

Apologies, I edited this after reading your post again. You were asking about IR capabilities of the D7D, I misread it as the D70.

As I can't remove this post, please ignore it. Parts of this post have been deleted.

[tokrot]

Originally Posted by Drudkh I did try but the 4 corners look funny, which I think that light went through the VF although I put on the VF cap. I don't know how to take IR, so can't really show any good pics.

Hi Thanks for sharing... From the look of it, it seems to be able to support, just that u didn't do enuff of PSing. What thread size did you use for your HOYA IR?

[tokrot]

Originally Posted by teerex DEFINITELY YES. Go to the IR/UV Sub Forum, lots of discussion of IR photography. There is a THREAD there on cameras capable of IR. I shoot all my IR pictures with the D70 and Kit Lens. You can get mono as well as colour IR with the D70. Here are some sample images. More images can be viewed at my IR Gallery. (my signature) The group at the IR Sub Forum, have outings very often. Join us if you can.

Errr.. I think u read wrong.. My Cam is D7D not D70... Anyway, thanks for reply...


edit: Btw I was in IR photography too when I had my S602z, just that I didn't shot much in IR.

[Del_CtrlnoAlt]

the 4 corners look more like a internal reflection or a lens flare... btw Don u used a square filter?

[Drudkh]

Originally Posted by Del_CtrlnoAlt the 4 corners look more like a internal reflection or a lens flare... btw Don u used a square filter?

Sorry guys, did not reply as I was away for 2 weeks ICT when you guys up the thread.

I was out with my friend to try out IR for 7D, it was a round 72mm or 77mm IR filter using a step-up ring.

I didn't know how to us PhotoShop but Paintshop Pro. it has a "1-Step Photo Fix" button that does the job for me. White Balance was set to "Auto" though. It was bright red in the original photo.

Thought of trying IR again, how much does a 77mm filter cost?

[Flare]

hahah... you know, maybe you could have tested the IR capabilities of the A1/A2 as well... Anyway, how long was the above exposure? Me thinking of trying IR too...

[Drudkh]

can't remember, EXIF says 4 secs. didn't try on A1 cos its 49mm.

[tokrot]

Originally Posted by Drudkh Sorry guys, did not reply as I was away for 2 weeks ICT when you guys up the thread. I was out with my friend to try out IR for 7D, it was a round 72mm or 77mm IR filter using a step-up ring. I didn't know how to us PhotoShop but Paintshop Pro. it has a "1-Step Photo Fix" button that does the job for me. White Balance was set to "Auto" though. It was bright red in the original photo. Thought of trying IR again, how much does a 77mm filter cost?

Hi Drudkh,

Thanks for your replies on PM. Really appreciated. So far out one of out 6 pic taken is similar to your first pic on this thread. I did some PS on it and found out it was somethig similiar to the IR pics taken by me last time. I was figuring out what went wrong this time. In fact I does not have enough experience in IR photography but I did some tests quite long time ago with my old Fuji S602z. The results was moderate good, only require more PS tweaking.

Btw, I bought a 67-62 and 62-52 stepdown ring to accomodate my 52 mm IR78..Will do more experiment and feedback. Thanks!

[Drudkh]

This is the unprocessed IR photo, resized.

[TME]

U can actually see the reflection lines in the original.... seems to be some internal reflection as mentioned....

[Drudkh]

Originally Posted by TME U can actually see the reflection lines in the original.... seems to be some internal reflection as mentioned....

yes, what i suspect is that during the exposure, the mirror flips up and some light passes through the viewfinder. if you look at the post-processed photo, it forms a rectangular shape which i think suits the shape of the mirror. this is what i can guess. i hope to try out again soon and find out what could be the problem.

[tokrot]

Originally Posted by Drudkh yes, what i suspect is that during the exposure, the mirror flips up and some light passes through the viewfinder. if you look at the post-processed photo, it forms a rectangular shape which i think suits the shape of the mirror. this is what i can guess. i hope to try out again soon and find out what could be the problem.

Yes someone mentioned about the same reflection thing in dpreview forum. Will do a test tomorrow and see..

[TME]

Originally Posted by Drudkh yes, what i suspect is that during the exposure, the mirror flips up and some light passes through the viewfinder. if you look at the post-processed photo, it forms a rectangular shape which i think suits the shape of the mirror. this is what i can guess. i hope to try out again soon and find out what could be the problem.

That means the VF cap supplies is lousy lar.... otherwise I dun see how else the light can get in unless there is diffraction of the light entering from the front element and then it scatters off the flipped up mirror? But that seems highly improbable and the VF leak more likely.... but then Minolta like that quite slipshod right?!

[Drudkh]

Originally Posted by TME That means the VF cap supplies is lousy lar.... otherwise I dun see how else the light can get in unless there is diffraction of the light entering from the front element and then it scatters off the flipped up mirror? But that seems highly improbable and the VF leak more likely.... but then Minolta like that quite slipshod right?!

i can't claim that the VF cap is lousy yet. i shot some IR with the cap on & off too but seems like all appears to have this problem.

however, something very wrong about this. i took some sunrise shots before i found out about the VF cap and also IR with long exposures like 30s to 60s, my photos do not exhibit such phenomenon.

a 30s long exposure. post-processed using Paintshop Pro's "1-Step Photo Fix" and found no evident on light leak despite no VF cap.

[TME]

Originally Posted by Drudkh i can't claim that the VF cap is lousy yet. i shot some IR with the cap on & off too but seems like all appears to have this problem. however, something very wrong about this. i took some sunrise shots before i found out about the VF cap and also IR with long exposures like 30s to 60s, my photos do not exhibit such phenomenon. a 30s long exposure. post-processed using Paintshop Pro's "1-Step Photo Fix" and found no evident on light leak despite no VF cap.

??? Huh? So the one with the reflection... how long is the exposure?

[Drudkh]

Originally Posted by TME ??? Huh? So the one with the reflection... how long is the exposure?

about 4 seconds... I just asked my friend regarding this issue (he shoot a lot of IR), he said that the CCD was picking up IR light from the lens, but if there's light from the VF, it will be natural light (non-IR). The flipped up mirror bounces the light from the VF and it somehow mixed with the IR light and hence this result.

[TME]

Hmm.... does that mean that on longer exposure the light entering the sensor saturates the sensor and drown out the reflection??? Strange phenomena...

[Drudkh]

Originally Posted by TME Hmm.... does that mean that on longer exposure the light entering the sensor saturates the sensor and drown out the reflection??? Strange phenomena...

I don't think that's the case. Anyway, unless some tests to be done or somebody did the tests and shared his results, otherwise it is plain guessing game.