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11-09-2011, 08:36 PM   #1
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Best shop for Sigma 100-300/4 repair

I recently acquired the Sigma 100-300/4 EX IF (non DG) which needs some minor repair or replacement of A-ring switch and AF calibration due to severe back focusing which is beyond my K-5 micro adjustment capabilities.
https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/164595-faulty-...-300-4-ex.html
I called C.R.I.S. - the do only work under the warranties. The Sigma NY, refused to give me even approx. quote, but told that I should hurry up, because they have very limited stock of the spare parts left. KEH promptly told me that they have flat repair rate of $110 plus cost of the parts and they don't have issues with parts so far.
Is there any US repair shop which may be considered better than Sigma, NY. Have you ever had a "lemon" from Sigma repair?
Thank you in advance,
SG

11-17-2011, 11:28 PM   #2
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I'm not sure about the Sigma repair facility but I can vouch for KEH- they know what they're doing with older lenses.

Adam
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11-17-2011, 11:53 PM   #3
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QuoteOriginally posted by Adam Quote
I'm not sure about the Sigma repair facility but I can vouch for KEH- they know what they're doing with older lenses.
Thank you, Adam. That was exactly my thoughts. I sent the lens to KEH for repair last week.
11-18-2011, 05:51 AM   #4
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I just sent mine to Sigma in Ronkonkoma, NY.

12-06-2011, 12:53 AM   #5
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Update

My recently acquired Sigma APO 100-300/4 EX came back from KEH repair today. They fixed the bad contact in aperture ring switch and calibrated the lens due to severe BF. From very first quick look the lens doesn't need any micro adjustment.
Buying the Sigma I supposed to add some versatility to my finalized FA*300/4.5+Tamron 1.4X Pz-AF TC straight 400mm combo. The lens is good but doesn't outperform neither my DA*60-250/4, nor FA*300 based combo.
Most likely I will not keep it.
It seems that KEH repair does a good job.
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