Modified DSLR Filter

[MrL]

Hi,

i have just had my Canon 7DMK11 Astro modified, prior to this I was using a Astronomik UHC clip in filter with it. My question is

do I carry on using the filter now it’s had the mod or not?

The mod was removal of the IR/UV filter and repositioning of the sensor. 

Thanks in advance. 

 

[Jokehoba]

I would say yes, keep using it. Your camera mod has extended the IR/UV range but you are probably mainly interested in the improved hydrogen-alpha response. So the filter will continue to cut the UV.

John

PS

I am assuming this is the filter you have:

[MrL]

Hi john,

thanks very much for getting back to me, yes I believe that’s the filter I have. 

I’ll keep it in the camera,  I just wasn’t too sure as the couple of images I have managed

to get are very red  single exposure .

 

 

Thanks again for advice 

Les.

[Uranium235]

Might be worth upgrading to the ccd cls filter. It has a harsher cutoff and slightly better transmission.

[Graham Darke]

I used to use the Astronomik UHC with my old Canon DSLR prior to having it modded. I found the results too red after I had my camera modded and switched to a CLS which gave much more balanced colours.

[catburglar]

The issue with most unmodded DSLR’s is that the IR cut comes in a bit too early therefore blocks most of the H-alpha signal.

I think Uranium235 has hit the nail on the head...My understanding is that the CLS-ccd filters add back a bit of IR cut that you’ve lost by modding the camera without blocking the H-alpha.

[MrL]

Thank you for your replies I’ll get a CLS clip in at the weekend and give it a try. Many thanks for your help.