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sigma 30mm f 1.4 on rebel xti
Hi, I just got this new lens and shot my first pictures tonight and have a question: my indoor shots all seem to be very warm, very tan-yellow. this is not how similar shots would normally look on my canon lenses (100mm f 2.8 macro, kit lens, and 70-300 IS). When I look at the histogram the red and green are spread over the whole width of the window but the blue is pushed mostly to the left with a large gap on the right. What's up? Do I need to make an adjustment for this lens?thanks in advance and sorry if this is a very basic question.Hank..

Comments (7)

Sounds like a white balance problem rather than a lens issue. If you are currently using auto WB, try selecting a WB appropriate to the lighting (e.g. tungsten/flourescent) for indoors or using custom WB. Alternatively shoot in Raw and adjust the WB in Canon DPP..

If you are still having issues, try posting on the Canon SLR Lens forum. AFAIK the Sigma lens doesn't have a colour issue but you might have a defective lens.Chris R..

Comment #1

Chris R-UK wrote:.

Sounds like a white balance problem rather than a lens issue. If youare currently using auto WB, try selecting a WB appropriate to thelighting (e.g. tungsten/flourescent) for indoors or using custom WB.Alternatively shoot in Raw and adjust the WB in Canon DPP..

I'd agree with Chris, 100%..

Sounds very much like white balance issues ... that were just never noticed, or didn't exist because of use of a flash, et cetera ... but at any rate, I'd say too ... white balance issues...

Comment #2

I generally agree with the previous posts and if what you're seeing is extreme then it should likely just be a white balance issue..

However, I'll also note that I do notice a slightly warmer image produced from my Sigma 30 than I do from most of my other lenses under proper WB conditions. It's not extreme by any means, but they are definitely more on the warm side...

Comment #3

Gear Collector I agree. though the previous posters were correct and I had the xti on auto WB, the sigma lens gives warmer images than any of the three canon lenses I own for the same ssetting on WB, whether that's auto, or flourescent or tungsten. It's a bit disappointing given I was very used to the cooler canon images and this is a surprise. I'd not seen this warmness mentioned in any previous posts I'd read about the sigma lens. I'll see if I get used to it and if the lens's other positives outweigh this negative. New to this, I don't do any processing of the pix after I take them (yet) but Photoshop Elements 6.0 is on it's way from Amazon as we speak: $74.99 and a $20 rebate.

Is something like this easily correctable/adjustable on Elements?..

Comment #4

Learn to shoot raw and adjust temperature to taste in PP...

Comment #5

Can I shoot raw and adjust temperature in photoshop elements?..

Comment #6

Is something like this easilycorrectable/adjustable on Elements?.

Yes, it's trivial. You can either use a set of sliders to adjust the R/G/B components to taste, or use the simple 'eyedropper' tool to select part of the picture that you know to be neutral white or gray and it calibrates against that..

If you shoot RAW it doesn't matter what you have the camera set to as the camera settings are only used for the JPEG conversion: you set the WB at the computer afterwards. PSE6 is compatible with 'Adobe Camera Raw' (free plugin) which allows you to open RAW files, tweak the WB, exposure, etc. and then export them to Elements for final processing..

Best wishesMike..

Comment #7

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This question was taken from a support group/message board and re-posted here so others can learn from it.

 

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