Author Topic: Advice on a Sigma lens please  (Read 3412 times)

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Offline digital master

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Advice on a Sigma lens please
« on: September 07, 2005, 01:14:49 PM »
I often see Sigma 70-200/2.8 APO EX lenses for sale...is this any good for the 7D?...I thought I had seen somewhere that the EX was not ideal for the 7D.

Ronin

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Advice on a Sigma lens please
« Reply #1 on: September 07, 2005, 02:09:57 PM »
There is a list of lenses that need to be re chiped


 (copied from German sigma site)

Dyanx 7d und 5d

   24-70mm F3.5-5.6 Asp. HF
Alle Objektive, deren Seriennummer mit 1..... beginnt
   24-70mm F2.8 EX ASPHERICAL
Alle Objektive, deren Seriennummer mit 1..... beginnt
   28-70mm F2.8-4 UC
   70-210mm F4-5,6 UC II
   100-300mm F4 EX APO
Alle Objektive, deren Seriennummer mit 1..... beginnt  
   300mm F4 APO Makro
   70-300mm F4-5,6 APO Makro Super
   70-300mm F4-5,6 DL Makro Super
   20mm F1,8 EX DG ASPHERICAL
Alle Objektive, deren Seriennummer mit 1..... beginnt
   24mm F1,8 EX DG ASPHERICAL
Alle Objektive, deren Seriennummer mit 1..... beginnt
   28mm F1,8 EX DG ASPHERICAL
Alle Objektive, deren Seriennummer mit 1..... beginnt

Dynax 7

   24-70mm F3.5-5.6 UC
   28-70mm F2.8 EX ASPHERICAL
   28-70mm F2.8-4 UC
   70-200mm F2.8 EX APO
   70-210mm F4-5.6 UC II
   70-300mm F4-5.6 APO Makro SUPER
   70-300mm F4-5.6 DL Makro SUPER
   100-300mm F4.5-6.7 DL
   135-400mm F4.5-5.6 ASPHERICAL RF APO
Alle Objektive, deren Seriennummer mit 1..... beginnt
   170-500mm F5-6.3 ASPHERICAL RF APO
Alle Objektive, deren Seriennummer mit 1..... beginnt
   300mm F4 APO TELE Makro
   600mm F8 MIRROR

Offline digital master

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Advice on a Sigma lens please
« Reply #2 on: September 07, 2005, 03:38:25 PM »
Thanks for that Ronin...I think I may well have answered my own question, one of my vast selection of lenses includes a Sigma 20/1.8 EX DG lens that I had to send back for re-chipping.  The lens now works fine, so I do not know where my brain invented this EX issue :oops:

Ronin

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Advice on a Sigma lens please
« Reply #3 on: September 07, 2005, 04:35:48 PM »
the sigma 80-200 2.8 ex is a great lens much faster focusing that my tokina 80-200 2.8 atx pro

dcap

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Re: Advice on a Sigma lens please
« Reply #4 on: September 07, 2005, 08:20:45 PM »
Quote from: digital master
I often see Sigma 70-200/2.8 APO EX lenses for sale...is this any good for the 7D?...I thought I had seen somewhere that the EX was not ideal for the 7D.


I bought a brand new one in Jan-05.  It was the slowest AFing lens I've ever had the mis-fortune of owning, I hated it.  Which is ultra odd, becuase AFAIK I am the only person who didn't like it!

Slow AF, Hunt, hunt, hunt.  Soft.  I had it for 4 months and gave it a very good run for its money, I bought it new and just refused to beleave that it was so poor.  

Didn't get one image I liked from it.  Got the 100-300/4.5-5.6 APO (D) during the 70-200/ex last month, the 100-300 pissed all over it in all accounts: speed/sharpness/size/weight.

Sure the 100-300 doesn't sound as sexy in spec terms and is only half the size.  But it delivers a lot more bang for the buck.

Unfortunately the 200/2.8 APO (D) [bought for deer shooting] killed the 100-300 off for me.  That lens is a big WOW

The 200/2.8 APO G prime used is cheaper than the Sig 70-200/2.8 EX used!  If you can find one.

PS - back in Apr-99 I has the Sig 17-35 / 28-70 / 70-200 f2.8 EXs in Canon AF on EOS 50 .... great lenses, lved them.  Only shot ISO 100 slide back then.  Didn't realise AF was slower on a Minolta than a Canon.  The Sig 70-200/2.8 EX on my 7D was disgrafully slow.  Unusable.  

Several people have commented that maybe I got a lemon.  New owner likes it though, even sent me a pic from safari in SA.  Look sharp(ish)