After years of great photos, my Rebel XTI (400D) is starting to look a bit long in the tooth. I’m considering replacing it with a 6D, but I’m on the fence because I think it might be more than I need.
The main reason to upgrade to full frame is better high ISO performance. Currently, I try to use ISO 200 or less because 400 looks kind of grainy and 800 looks downright bad. Since I’m often in dark-ish conditions: overcast, forests, shadows, etc., I end up with the hobson’s choice of underexposed vs. blurry. The larger, newer sensor should give better (less noisy) results at higher ISO, right?
This is strictly a hobby and the camera is used almost exclusively while on vacation. Light weight and small size are important, because I hike it around all day; hence the 6D instead of the 5D mk3, which would undoubtably be overkill anyway. The photos are nearly all landscape, wildlife, bugs & flowers (macro), with occassional indoor museum stuff. No studio, sports, events, or portraits; just the odd friend or family in the foreground.
The other problem is that if I would have to change most of the lenses, currently an EFS 17-55 f2.8 IS, EFS 60 2.8 Macro, and EF 70-300 f4.5-5.6 DO.
The 17-55 is used most often and there is no direct equivalent EF mount lens. The new 24-70 f4 IS looks like a good substitute, with the new and improved IS compensating for the smaller max aperture. Also, the macro mode may be good enough for the occasional cool bug picture, so I could forego buying a dedicated macro lens to replace the 60 Macro.
To make up for the loss of the 1.6 crop factor, I’m considering trading the 70-300 for a 100-400 f4.5-5.6 which is the longest non-astronomically-priced telephoto zoom available. Perhaps with a 1.4x teleconverter. Is the push-pull zoom hard to use?
Does this make sense or am I going overboard? Since most of the lenses would have to go, should I look at other brands? Thanks.