10-22 and 17-40 or just 10-22?

I recently had a camera converted to IR only to find out basically none of my lenses are compatible (give hot spots) so I'm re-evaluating my lens situation and I just wanna know if I'm going overboard here. Should I just get the 10-22 or get both the 10-22 and 17-40. The 10-22 would be for my IR converted camera AND my regular camera, as I will be selling my sigma 10-20 in order to fund it. If I got the 17-40, it would be dedicated just to infrared. I'm just not sure if the extra 18mm I would gain is worth getting both. What do you think? Thanks in advance.

Dave

pretty pretty please?

Isn't there another current thread going on about IR pix? Doesn't IR performance almost top Focal length in deciding?

gasrocks wrote in post #5237948
Isn't there another current thread going on about IR pix? Doesn't IR performance almost top Focal length in deciding?

They're both supposed to perform well with IR, that's what I have it narrowed down to those two. I'm just undecided if I should get both or just the 10-22mm.

i'd stick with the 10-22. the extra 18mm only gets you into 'normal' range. 17-40 on a crop body is like having another kit lens as 17mm is not wide. the 5mm overlap is a waste as well.

all depends on what you're looking to shoot, some people feel that the 10-22 is "too wide"

I'll probably just end up getting both, lol. But if it seems like it's too much overlap, I'll just sell one of them. Thanks guys.

Dave

Have you considered the 24-70mm? That would be something nice to have to cover the slightly higher zooms, then use your 70-300mm and your set.

darksparkz wrote in post #5245446
Have you considered the 24-70mm? That would be something nice to have to cover the slightly higher zooms, then use your 70-300mm and your set.

I have considered it but I can't afford it. I have to sell my sigma 10-20 and canon 70-300 in order to afford the new lenses, so I figured the 17-40 would be a good walkaround for the IR camera since it goes fairly wide, and when I want to go wider for any reason I'll have the 10-22 nearby.

I read at a IR conversion company's site that the canon 10-20mm lens has a different IR focal length than other canon lenses. This means that if you plan to use this lens, there is a calibration process that will match your IR camera to the lens... making it a matched pair can screw with it's mating to other lenses... caution.

here is the snippet from MAXMAX.com. They are well know in the IR conversion world.

NOTE: If you are sending a Canon camera and use their 10-22mm EFIS lens as your primary lens, let us know. The 10-22mm EFIS has a different IR focal point than most other Canon lenses. If we adjust your camera to be sharp with the 10-22mm lens, then other Canon lenses will not be sharp unless you shoot at F10 or high. If we adjust the camera for normal Canon lenses, the 10-22mm lens with not be sharp especially at the corners at 10mm

Enjoy
Mike

I agree with Mike (above) if you get the EF-S 10-22mm, then you'll need to calabrate the focus on the camera for this lens, which in turn will cause problems with any other Canon Lens you put on it.

I've never used the Sigma 10-20mm - does this produce hot-spots on your IR camera?

I guess in the end, you need to decide how wide you need to go. The 17-40mm will give you around 28mm at the wide end. Is this enough?

For what it is worth I use a 17-35L (quite an old lens). I use this for IR with minimal hot-spots. I haven't found a lens any wider than this that is satifactory for IR. They may exist but I haven't found one - anyone else?

wnelson wrote in post #5246328
I agree with Mike (above) if you get the EF-S 10-22mm, then you'll need to calabrate the focus on the camera for this lens, which in turn will cause problems with any other Canon Lens you put on it.

I've never used the Sigma 10-20mm - does this produce hot-spots on your IR camera?

I guess in the end, you need to decide how wide you need to go. The 17-40mm will give you around 28mm at the wide end. Is this enough?

For what it is worth I use a 17-35L (quite an old lens). I use this for IR with minimal hot-spots. I haven't found a lens any wider than this that is satifactory for IR. They may exist but I haven't found one - anyone else?

This sigma does produce hot spots. Actually, I purchased the 17-40 through someone on the forum last night. If I get the 10-22 as well, I'll just make sure to shoot above f10 like was suggested previously. Then again, the 17-40 might be enough for what I wanna do with IR; I'm just not sure yet.

forsakenme720 wrote in post #5249270
This sigma does produce hot spots. Actually, I purchased the 17-40 through someone on the forum last night. If I get the 10-22 as well, I'll just make sure to shoot above f10 like was suggested previously. Then again, the 17-40 might be enough for what I wanna do with IR; I'm just not sure yet.

Thanks for that confirmation on the Sigma. I can cross that one off my list now

Before investing in the 10-22mm, it may be prudent to test it out with IR. Should be easy enough to take your IR camera into a shop and 'borrow' the lens for a few minutes. You could test for hot-spots and focus at the same time. One of the problems you will come up against if you try and stop down (to compensate for focus) is diffraction (which kicks in earlier with IR).

I have the 10-22 and the 17-40, but not for IR photography. I don't really find them to be interchangeable and each has it's place and limitations. The 17-40 is a sharper lens too.

JJ

wnelson wrote in post #5250857
Thanks for that confirmation on the Sigma. I can cross that one off my list now

Before investing in the 10-22mm, it may be prudent to test it out with IR. Should be easy enough to take your IR camera into a shop and 'borrow' the lens for a few minutes. You could test for hot-spots and focus at the same time. One of the problems you will come up against if you try and stop down (to compensate for focus) is diffraction (which kicks in earlier with IR).

No problem. Actually, my local camera shop doesn't have the 10-22, otherwise I would do that. I've seen some amazing IR shots done with that lens though, so I figure if they don't get hot spots then I shouldn't either. Either way though, the 10-22 can't be any worse with IR than the sigma. Besides the hot spots, there's crazy flare all over the place with that lens in IR.