« on: August 01, 2011, 10:29:16 AM »
I thought you said you tested the 17-40 and already had the lens in question and found it superior than the 17-55 in "every way"? F4, for most indoor environments was never claimed to be the best of both worlds... In most indoor environments, F2.8 is ONLY 1 stop more light and may not even be enough. You can pick up cheap primes of 50mm 1.4, 35mm 1.4, etc (Even those would have incredibly shallow DOF and need a tripod to shoot with a lower F stop to get more DOF) Low light situations is a constant battle... you can always get a faster lens but faster lenses have smaller DOF and that can hurt shots as well. Then it's either raise ISO or get more light, hence strobes or flash... those would be more suited for indoors. That being said, it appears that you are shooting handhold, am I correct? For those macro shots which tend to lose light as is due to lighting environments, you almost need to use a tripod. Using a tripod will allow you to knock down the ISO, longer more stable shots, sharper images, etc... You can also get a ring light that goes around the lens to add more light in those macro settings. In the forest you can get a neutral density filter, and lengthen the exposure, lower ISO and get a better shot overall. I dont know if the grocery store will allow a tripod in their store unless you give them a few photos, but that's the route i'd go in. Also bring a gray card with you to run a quick white balance in commercial buildings... florescent lights are nasty to work with. In this Ultrawide area of lenses, distortion will be a fact of life, but it will just vary depending on your lens and camera. The only way to really avoid distortion is TS lenses.