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Sony a57 + Sigma 18-250 Lens: How do I use lens correction in Aperture?

Forgive me if this is more obvious than I expect, but I recently purchased a Sony a57 Camera, which I really, really enjoy. I will be doing some traveling, and purchased a Sigma 18-250mm 1:3.5-6.3 Macro HSM lens to pair with my camera. I have read that many people will use "lens profiles" to correct their images when they import them into Aperture. How can I find a lens profile for my lens? [more inside]
posted by smitt on Aug 12, 2013 - 1 answer

Professional certificate in Project Management or Green Belt in 6 Sigma

Professional certificate in Project Management or Green Belt in 6 Sigma, which one is better for the resume or the career in general? [more inside]
posted by modoriculous on Feb 12, 2013 - 11 answers

Nikon D5100 lens for youth sports?

I'm going to rent a lens for my Nikon D5100 for the weekend to shoot a bunch of youth (8-10 year olds) soccer games. What would be the best lens at a reasonable price? [more inside]
posted by Doofus Magoo on Sep 3, 2012 - 13 answers

Obscure Honors Society: Worthwhile Investment or Complete Scam?

Have you ever heard of Sigma Alpha Pi? Not a frat or sorority, but a "society of leadership and success" is what they call themselves. I was asked to join my university's chapter. Is it worth it? [more inside]
posted by emilyclaire on Aug 20, 2011 - 14 answers

I used to love this lens ...

My Sigma camera lens stopped working - what's causing it and what can I do? [more inside]
posted by komara on Feb 14, 2011 - 10 answers

Sigma vs. Canon

Sigma 18-125mm f/3.8-5.6 AF DC OS HSM vs. Canon EF-S 15-85mm f/3.5-5.6 IS USM, besides the obvious zoom range differences is the Canon really worth twice the Sigma? I've checked a number of reviews and it doesn't look like the Canon's advantage is as clear cut as the price would suggest.
posted by tommasz on Dec 28, 2010 - 10 answers

Confused about a Sigma lens for Pentax

This new lens from Sigma (18-250 zoom) comes in a Pentax mount. Pentax puts their DSLR image stabilization in the camera body and not in the lens like Nikon or Canon. Yet the description for all the lenses is the same - image stabilization in the lens. Is this a case of cut&paste product descriptions or would using this lens on a Pentax camera have double image stabilization (both lens & camera body)? [more inside]
posted by GuyZero on Nov 2, 2009 - 5 answers

Cheese! Wanted a Sigma DP2 but having doubts, recommendations?

I've been thinking of buying a new point-and-shoot camera for a while. I've had some lame experiences with previous point-and-shoots (blurry photos, bad colour balance, etc), so I'm asking the green for some advice. [more inside]
posted by doctor.dan on Jun 19, 2009 - 34 answers

Different exposures of the same scene

Exposure difference between two lenses at the same aperture? I just noticed that using the programmed exposure on my d80 with two different lenses at the same aperture produces different shutter speeds - even though the scene is the same. [more inside]
posted by FidelDonson on Dec 2, 2008 - 12 answers

Is my Sigma lens dead?

Is my Sigma lens dead? [more inside]
posted by stackhaus23 on Oct 11, 2008 - 5 answers

Which lens do I buy?

Photofilter: Which lens should I buy? I'm in the market for a new prime. I've narrowed it down (for various reasons) to either Canon 85/1.8 or the new Sigma 50/1.4. Do any fellow photogs out there have experience with either one or have a recommendation. Eventually, I want to go with the 85/1.2II but it'll be awhile before I have the cash. I'm looking for something with good bokeh as I like to shoot wide open and get short DOF. Currently, I'm using an old OM Zuiko 50/1.4 to achieve that but since it's not autofocus, I miss more in-focus shots than I like. In case you need to know to answer I shoot on a 30D and a 5D. Thanks!
posted by damiano99 on Aug 23, 2008 - 14 answers

Best walkaround zoom for Pentax K100D

I bought the Pentax K100D dSLR, partly on recommendations from here, and I love it. I have the 18-55 kit lens and the 50-200 zoom lens, which I mostly use. Now I would like to buy a faster in-between zoom, somewhere from 24-28 at the low end to 75-135 at the high end. I am trying to figure out whether to buy a Pentax, Tamron, or Sigma lens and am getting confused with all the contradictory reviews. The Tamron 24-135 is praised to the skies by some and trashed by others. I am leaning towards the Tamron 28-75 but would like something closer to 100 mm. Any advice?
posted by blue shadows on Nov 22, 2007 - 7 answers

Did you get that memo? Yeah.

Calling all IT professionals! Teflon recruiters! Scrum masters! Project overlords! I'm curious about the current state of certifications. PMP, CAPM, Six Sigma BB, CSP, that kind of thing. [more inside]
posted by cavalier on Jun 27, 2007 - 6 answers

Standard Deviant Behavior

IANAS. How can I average two standard deviation values? [more inside]
posted by DU on Apr 18, 2007 - 5 answers

Is the canon XTi kit lens even worth it?

Any point in getting the Canon XTi lens kit? Tamron or Sigma? [more inside]
posted by illegiblemess on Jan 30, 2007 - 14 answers

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