So I've had my EOS 7D for about 18months now (upgrade from EOS 400D) and thoroughly pleased with the investment. One disappointment however is the inconsistent results I've been getting with my Sigma 30mm prime which is the main lens I use.
I originally got the lens with the old 400D when our first child was born, the intent being to have a lens fit for low light that wouldn't require flash use that would drive the babies nuts. For the most part with the 400D the results were good but with the 7D we seem to be getting a lot of blurred shots. I suspect that this is largely because, as I understand it, the wider the apperture the greater the effect on depth of field which equates to greater focussing difficulties. And yet the results seem to be a lot more hit and miss (mostly miss) on the 7D as opposed to the 400D.
My needs and use for this lens haven't changed, does anyone have any suggestions where this is concerned, whether that be with technique, settings or even whether an alternative lens would be worth investing in (if the latter let me know your lens recommendation).
I also use a 70-200 f2.8L and the results have left me thoroughly orgasmic. Despite the fact the use of the lens differs, i.e. different light conditions, depth of field, subject matter etc, I must admit I wasn't prepared for just how much crisper the image is and more brilliant light, colour and contrast is with the L standard glass. For me I always felt like it was like standard Def Vs high Def video, I had my doubts you'd really notice the difference but hell do you ever notice the difference. Needless to say I would be prepared to step up the standard of lens if there was a good alternative out there that someone can recommend.
I also want to add a wide angle lens to my kit, this is really the last piece of the puzzel for me, it would serve to do landscapes and large group shots. I was going to get the Sigma 10-20mm but given the difficulties I've been having with the other lens I feel less confident about this purchase. Though having said that I'm struggling to find a better lens than the sigma which offers the same degree of angle, does anyone have any suggestions in this regard??