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Sigma Bigma

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MikeKeyW

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I just got the "Sigma" 50~500 f4-6.3 and noticed that the exif data records my shots wide open at 500 as being at 5.6, not 6.3. Is this because the lens is faster than marked or a quirk of the lens on a SD-9, which lists my choices as either 5.6 or 6.7 on the scale as my 2 fastest apertures?
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Mike Mosher, Native Conch

KM 7d, KM 11~18, Sigma 17~35 f2.8~4 EX, Sigma 24~70 f2.8 EX DG, KM 28~85 3.5/4.5 Pony Beercan, KM 80~200 f2.8 APO 'Blackie', KM Beercan, Sigma 400 f5.6 APO, KM 3600 HS(D)
Sigma SD-9, Sigma 20~40 f2.8,Sigma 70~210 f2.8, Sigma "Bigma" 50~500 f4-6.3,
Sony DSC-f707
Sony DSC-f828
 
Yes it is "normal" with the SD9 given its half-stop increments. You may also find that your focal length exif jumps (137, 161, 191, 226, 266,313, 363, 417,500).

R

BTW, I have an 86mm tiffen pro circularizer if you are interested in buying. I had the Bigma and sold it. I am using it as my "77mm" with a step-down. It vignettes on my 10-20.

R
--
See Mr. Gecko full size at:
http://www.pbase.com/rickdecker/image/61996346

See Sigma Lens Tests At:
http://www.lightreflection.com/sigmalenstests/matrix.htm

Images at:

http://www.pbase.com/rickdecker
http://www.lightreflection.com



Powered by Sigma......
Empowered by Foveon

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
 
How do you like the lens so far?

--
- - - - - - - - - - - -

If you cant DODGE it... RAM it!!!
Take pictures till it blows up!
'Nothing shoots like a CANON!'
 
Hello,

This is how the Bigma reports the F number at wide open, even on a Canon 20D. It does so, or the Autofocus would not work, at least on a Canon, since it sets 5.6 as the smallest aperture at which it will AF.

So I guess the Bigma does the same on a Sigma camera.

It is an incredible lens though ! A little low on contrast, but that is easily corrected in postprocessing.

Have fun with it !

Geir Ove
MikeKeyW said:
I just got the "Sigma" 50~500 f4-6.3 and noticed that the exif data
records my shots wide open at 500 as being at 5.6, not 6.3. Is this
because the lens is faster than marked or a quirk of the lens on a
SD-9, which lists my choices as either 5.6 or 6.7 on the scale as
my 2 fastest apertures?
--
Mike Mosher, Native Conch
KM 7d, KM 11~18, Sigma 17~35 f2.8~4 EX, Sigma 24~70 f2.8 EX DG, KM
28~85 3.5/4.5 Pony Beercan, KM 80~200 f2.8 APO 'Blackie', KM
Beercan, Sigma 400 f5.6 APO, KM 3600 HS(D)
Sigma SD-9, Sigma 20~40 f2.8,Sigma 70~210 f2.8, Sigma "Bigma"
50~500 f4-6.3,
Sony DSC-f707
Sony DSC-f828
Click to expand...
--
My album at: http://objective.bitfikler.com/geirove/web/
 
The more I use it the more I love it, though I'm not accustomed to carrying that much weight on my nature walks. It does give you a more robust outing so I look forward to its helping me shed some excess baggage from my waist. I had really wanted the 80~400 OS but have not seen any Sigma mounts in my budget. It really needs a sturdy tripod, I can't kid myself anymore about hand holding a 500/850 FOV lens, so that adds to my workout and helps balance the load. Thanks.
--
Mike Mosher, Native Conch

Sigma SD-9, Sigma 70~210 f2.8, Sigma Sigma 50~500 f4~6.3, Sigma 20~40 f2.8, Sigma 28~80 f3.5~5.6, Sigma 70~300 F4~5.6
 
I have an 86mm polarizer to sell if you are interested. Left over from my Bigma days. I am using it with a step-down for my 77mm lens and am (planning) getting a 77mm on EBAY. IT is a Tiffen pro 86C (for coarse thread for the 50-500) and a very good one. You can see tests of it on my lens test sit below.

R
--
See Mr. Gecko full size at:
http://www.pbase.com/rickdecker/image/61996346

See Sigma Lens Tests At:
http://www.lightreflection.com/sigmalenstests/matrix.htm

Images at:

http://www.pbase.com/rickdecker
http://www.lightreflection.com



Powered by Sigma......
Empowered by Foveon

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
 
While I'm certainly "In the market", I'm a bit tight on disposable income at the moment. My wife noticed the Bigma when I forgot to lock the zoom (I'd been hoping to pass it off as my old Minolta mount 400/5.6) and didn't go for the "I've had this for ages" ploy. My email is listed on my profile, let me know what you want for it and I'll let you know when the surveillance has been throttled back.
--
Mike Mosher, Native Conch

Sigma SD-9, Sigma 70~210 f2.8, Sigma Sigma 50~500 f4~6.3, Sigma 20~40 f2.8, Sigma 28~80 f3.5~5.6, Sigma 70~300 F4~5.6
 
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