danny819 wrote in post #13083073
A 5DII with a 24-70L might be too short if this will be my only lens. Therefore, I am debating between:
5DII with 24-105L or
7D with 24-70L
What do you guys think? I would definitely appreciate some feedback from people! How would the bokeh from the 5DII/24-105L combo compare to the 7D/24-70L combo?
I think you may find the EF 24-70mm f/2.8L to be too wide on a 7D for smaller focal lengths. The 24mm is really 38.4mm when that lens is on a 7D. If you want the range on the 7D to include "wide," you might want to consider the EF-S 17-55mm f/2.8 IS. This would give you an effective focal length range of 27.2 - 88mm, with the constant f/2.8 aperture, plus IS to boot. The EF-S lens has somewhat more differential focal length range than the EF lens, and it covers more useful focal lengths for a 7D body than the EF would on that same body. It's imaging is really superb, on a par with the EF lens, it's basically a "L" lens like the 24-70 for 1.6x FoVCF cameras, but without the price tag and weight.
The primary downside to EF-S vs EF L-series is that this particular EF-S lens is not as robustly built (lacking a metal barrel), nor is it as weather-sealed. At the same time, this EF-S lens is relatively well-made, it's not "cheap" to the feel, everything is smooth to operate. I do think with some care, these are not serious issues compared to ability to hand-hold with lighter equipment, unless your application really does include foul weather. Also, I have personally found L-series lenses to not be as robust as they are said to be, several of mine have become damaged under circumstances that would been no worse than if a strong plastic lens had similarly been involved.
You'd also mentioned the EF 24-105 f/4L. This would seem to indicate that the very fastest aperture is less of an issue for your application? If so, I can also really recommend the EF-S 15-85mm f/3.5-5.6 IS lens for the 7D. It has enormous range, 24-136mm equivalent. The aperture is variable, but it's slightly faster than the EF 24-105 f/4L over much of the range, with seriously good optics. Definitely a full-stop slower at the telephoto end by comparison compared wit the EF 24-105 f/4L. And again, metal barrel versus hard plastic barrel, but still well-made.
I faced some similar choices as you, and really seriously investigated the lense options for some of my older 1D- camera gear (a 1D Mk III, 1Ds Mk II). My conclusions were that there was so much more flexibility and lens coverage for the 1.6x system with the 7D camera, that it made tremendous sense to re-invest. I was not often working in rain or sleet (for which I would use a 1D body), and given the strong attention to weather sealing that the 7D got, it all "came into focus" (sorry a pun ...) to use EF-S and 7D as a really robust flexible system.
On the option to use EF-S lenses, I was responding to what I understood your desire to be for compositional freedom -- sure hope I grokked that right. Otherwise, your main dilemma appears to be over full-frame versus not?
To resolve that perhaps more scientifically, I can offer the suggestion of what I did in the same situation -- take a look at your EXIF data from years past work. Do you see some trends in the most-often used focal lengths? In my case, I found that that EF lenses simply could not get single-lens coverage for the working distances and studio situations I would regularly encounter ... whereas EF-S did. So that phenomena is what led me to reinvestigate the 1.6 FoVCF system -- and of course the 7D camera is amazingly feature-filled.
Whatever you decide, wish you much luck in your photography!