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Forum: Lens Clubs
02-24-2010, 12:37 PM
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Forum: Lens Clubs
01-10-2010, 11:17 AM
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Can't help you specifically with the 10-20 and flash (but thanks to this thread it is on my wishlist and short-listed!), but for any wide-angle flash work, you really need to use a "dome-type" diffuser. Yes, it limits the distance and power of your flash, but point the thing up with a plastic blob on it and it will light up your wide angle field of view.
Most motorized flashes (like the 360) only go to about 24mm FOV, and their little "plop-up" diffuser panels do jack. Get an Omnibounce or a cheap knock-off of a Gary Fong (google them), or make one out of translucent white tupperware. Looks silly, but does the trick!
To keep more of your flash power going forward (the above plastic diffusers scatter the light 360 degrees), you could also go "turbo-silly" and build one of these: DIY Reflector-Diffuser
Here is a pic of Gooshin (from this very forum) trying my DIY wide-angle bounce diffuser out:
(Not taken with a Sigma 10-20mm!)
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Forum: Lens Clubs
01-02-2010, 07:36 PM
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There must be a difference, since one is a constant (larger) apreture than the other. ;)
Here is a side-by-side test of wide-angles (for C*nonfodder) I found:
Juza Nature Photography
Apparently, flare and corner sharpness are more controlled, but it looks like CA has gone up along with the filter thread (3.5 has 82mm, while the 4-5.6 has 77mm). No idea about the PF, but if the "older model" had it under control, the new one should be good there, too.
I'm likin' what y'all are showin! (Bad for pocketbook)
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