Mike Holmes wrote:
I am new to wildlife and landscape photograph. After much reading I have come to the conclusion that the ideal solution for me as a armature photographer is a Canon t7i camera with a sigma 18-250 zoom lens and the new canon 100-400 zoom lens. Do to the 1.6 magnification in the crop sensor I will have an effective range of 29 to 640 with two lenses. I am sure there are other solutions and would appreciate hearing the cons to this solution.
Actually, instead of the Sigma 18-250mm... Partly because it overlaps A LOT of the 100-400mm.... But also because I'm just not a big fan of super wide ranging "do it all" zooms like the Sigma. Zooms like that generally have to compromise in a number of ways, in order to have such a wide range of focal lengths (almost 14X, in this case!)
The 100-400mm, on the other hand, is a much more "reasonable" type of zoom... 4X and telephoto-to-telephoto (instead of wide-to-normal-to-telephoto). Either of the Canon 100-400mm versions is very good. The "II" is the best of the two.
Along with that, I would recommend either:
1. Canon EF-S 15-85mm IS USM... wider would be good for landscapes... there's a significant difference between 18mm and 15mm. Still a two lens kit. The minor gap between 85mm and 100mm is pretty inconsequential.
OR
2. Canon EF-S 18-55mm IS USM (cheaper)... or EF-S 18-135mm IS STM (mid-priced) or EF-S 18-135mm IS USM (faster focusing, higher priced) AND either a Canon EF-S 10-18mm IS STM (very compact and affordable for an ultrawide) or EF-S 10-22mm USM (more expensive). This three lens kit that gives you even wider angle of view. The 18-55mm or 18-135mm should be available "in kit" with the camera, for some savings.
The gap between 55mm and 100mm isn't a very big a deal either... But if you wish, maybe someday you may want to add an EF-S 60mm f/2.8 Macro, which is reasonably compact and one of the more affordable macro lenses. There's also the Tamron SP 60mm f/2, which is a bit slower focusing, but fine for macro AND... thanks to it's larger aperture... for portraiture. An alternative is the Tamron 90mm f/2.8 (two versions, the more expensive one has stabilization and faster focus drive).
More "premium" alternatives to the above kit lenses: EF-S 17-55mm f/2.8 IS USM... OR EF 24-70mm f/4L IS USM, which is able to do a lot of macro work on it's own. It's .70X magnification is 3X or 2.5X more than most zooms are capable of doing.
T7i should be fine. 77D or 80D would be even better... Both of them give more direct access to some controls than T7i... 80D also uses a larger battery that gives about 2X the shots per charge that the other two do. 80D also has a larger, brighter viewfinder (uses a true pentaprism, while the other two use a penta-mirror to save weight and cost). But the camera doesn't matter as much as the lenses you use on it. All three of these models have very similar image quality potential because they share essentially the same 24MP sensor.
The 100-400mm II is moderately large and weighs about 3.5 lb. It's eminently hand-holdable for a while... But if doing a longer shooting session, such as sitting in a blind waiting for wildlife, you may want a good tripod. Don't go too cheap with that, because a quality tripod can last a lifetime, while cheap ones never do the job very well and usually end up having to be replaced every year or two. If you get a tripod, for wildlife photography you may want to use some sort of gimbal mount. There are several types, but one of the less expensive and most convenient is a gimbal adapter that works in conjunction with a quality ballhead on the tripod (other types completely replace any other head, making the tripod "long lens only" for all practical purposes). But, if you do that you'll need an Arca-Swiss style quick release on the lens.... and that's a little tricky with the 100-400 II. The tripod foot Canon provides is stylish, but difficult to effectively fit with an Arca-style lens plate. However, there are replacement feet custom made to fit the 100-400 II that work very well: Kirk Photo, Hejnar Photo and Really Right Stuff all make versions. The less expensive of these aren't much more expensive than a quality lens plate, and work much better on this particular lens.
Have fun shopping! We're always happy to help you spend your money!