Has anyone used this, know much about it, or can recommend it? It looks to produce some very sharp results, on par with those of some Canon L lenses.
I was looking at the Sigma 50-500 for the focal range, but there seem to be some focusing problems with it (due to the weight a wide aperture is needed to keep shutter speeds up, so depth-of-field seems to be a problem etc).
I don’t want to be stuck with a 300mm max range as that’s what I have at the moment. And so if I did decide on the 100-300, it’d probably be with a 1.4x convertor too. Does anyone know how the 1.4x affects results, and does it change the f-stop of the lense?
By: Jur - 25th October 2005 at 10:44
Weight gives a lens more stability and with practice you should be able to hand-hold it with less shake than a lighter lens of equivalent focal length.
Exactly my experience too!
By: wannabe pilot - 24th October 2005 at 22:37
Nonsense – who told you this?
No-one told me. I knew someone would pick up on it as I wrote it, but I was too concerned with other things to worry about re-wording it. It’s just something that I was trying to explain (obviously I explained it badly) from what I’ve seen with originals from the camera. I’ve seen consecutive soft results, and ones where part of the photo appears out-of-focus. With the 75-300 it’s so light, that I can happily shoot approaches at f11 with anything down to 1/125. Whereas the weight of the 50-500 means that aperture usually needs to be larger to give a higher shutter speed, reducing the chance of blurring results. So I’m suggesting that maybe it’s more difficult to get sharp results..unless you can easily handle the weight.
By: brycheiniog - 24th October 2005 at 22:06
Hi,
I have a Sigma 100-300 F4, and apart from it being fairly heavy its a great lens :). Pretty much all the shots that I have taken at airshows this year have been taken with this lens. My gallery is here :-
http://www.pbase.com/brycheiniog/air_shows
I also have the 1.4x TC, and I find it works very well provided I keep the shutter speed high enough. Adding the TC turns it into a 140-420 F5.6.
Jonathan
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October 24, 2005 at 9:31 pm