you already know what im going or have voted for
. Doug, seriously, some people think it doesn't make that much difference between a modded and a non-modded DSLR but they have never used a modded one before. You'll need to ask the ones who have used a modded and a non modded and i can gurantee you, they never regret getting their DSLR modded.
You certainly can use a modded DSLR for daylight use. See for comparison under FAQ.
http://www.ezystyles.com.au/modification.html
To make the 40D perfect for normal daylight use (literally identical to an unmodded version) you will need the Daylight Front Filter. After using correct white balancing on a modded DSLR, colours will still be slightly off only slightly. With a daylight front filter, this will correct it back to normal. The only drawback is that you cannot use EF-S lense as the EF-S lense will hit the front filter.
Once you have your 40D modded with a UV/IR filter or clear glass adding a daylight front filter:
Advantages:
- Can be used for astrophotography
- Can be used for daytime photography
- All automatic dial functions work perfectly
- No need for custom white balancing, can leave it in AWB
- Clear glass version can be used for Infrared Photogtaphy
Disadvantages:
- Cannot use EF-S lense.
In regards to exposure time, definitely a modded DSLR requires much much much less exposure time to get the same amount of photon's than an unmodded DSLR.
There will be a risk of over-exposed images with lengthy subs whether if it is modded or unmodded.
cheers.