I'm thinking of getting a T3i (600D) converted to full spectrum. Objective is to use it for IR and visible light (with external filters) Have a few queries, would appreciate if any of you could help me with them.
1. How good will the visible light IQ be with a quality UV/IR cut filter when compared to a stock camera?
Pretty much as good as original, depending on how the conversion is done.
2. I've read different wavelengths of light focus at different focal planes resulting in chromatic aberration when shooting full spectrum, any remedy to this? Also would I still get CA when say shooting only IR or Visible with filters?
CA will vastly depend on lens, some control the IR portion more then others. Some lenses are horrible in the IR region, having weird hot spots.
As for when shooting WITH an IR block, the result will be pretty much the same.
By using an IR block filter all you are effectively doing is MOVING the filter from in front of the sensor to in front of the lens.
3. Your recommendations on a quality UV/IR cut filter.
Would love to see some samples, if you have any please do post.
Any additional info you can provide would also be appreciated.
I just finished modding a 350D to full spectrum. I pulled the IR block and replaced it with a UV filter that I cut into the right shape. Since the glass is different (both in properties and in thickness) I had to adjust the focus using the focus adjust screw on that era of bodies.
The results are pretty damn good if I do say so myself!
This is one of the first shots I took, it looks pretty "normal", but if you look closely, the tree that's light brown in colour actually has dark brown leaves!
And the grass is alot lighter then it normally is.