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Tamron SP 70-210mm F/3.5 19AH: won't focus at infinity



 
 
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  #1  
Old September 4th 09, 04:42 PM posted to rec.photo.equipment.35mm,rec.photo.digital.slr-systems
SPAM.WATCH
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Posts: 14
Default Tamron SP 70-210mm F/3.5 19AH: won't focus at infinity


"TJ" wrote in message
...
Advice please

I have a Tamron SP 70-210mm F/3.5 Model 19AH: with the Adaptall 2 for
Canon EOS on a 450D body.

It is wonderfully sharp - but won't focus sharply on infinity - like
the moon.

What to do?

I know a few people had issues with the Maxxum and the EOS Tamron Adaptall 2
mount. That's why Tamron dropped them fairly early on.They often wouldn't
allow infinity focus, Canon had the same issue with their own FD-EOS
adapter.



  #2  
Old September 5th 09, 11:59 PM posted to rec.photo.equipment.35mm,rec.photo.digital.slr-systems
Wolfgang Weisselberg
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Posts: 5,285
Default Tamron SP 70-210mm F/3.5 19AH: won't focus at infinity

SPAM.WATCH wrote:

I know a few people had issues with the Maxxum and the EOS Tamron Adaptall 2
mount. That's why Tamron dropped them fairly early on.They often wouldn't
allow infinity focus, Canon had the same issue with their own FD-EOS
adapter.


Canon's FD-EOS adapter had no infinity focus problems. After all,
it was designed as a 1.25x (IIRC) teleconverter (extender) to
circumvent the problem (and it only worked with the long lenses).
Cheap FD-EOS converters (without optics) have infinity problems,
and cheap ones with optics have quality problems.

-Wolfgang
  #3  
Old September 6th 09, 12:51 AM posted to rec.photo.equipment.35mm,rec.photo.digital.slr-systems
nospam
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Posts: 24,165
Default Tamron SP 70-210mm F/3.5 19AH: won't focus at infinity

In article , Wolfgang
Weisselberg wrote:

SPAM.WATCH wrote:

I know a few people had issues with the Maxxum and the EOS Tamron Adaptall
2
mount. That's why Tamron dropped them fairly early on.They often wouldn't
allow infinity focus, Canon had the same issue with their own FD-EOS
adapter.


Canon's FD-EOS adapter had no infinity focus problems. After all,
it was designed as a 1.25x (IIRC) teleconverter (extender) to
circumvent the problem (and it only worked with the long lenses).
Cheap FD-EOS converters (without optics) have infinity problems,
and cheap ones with optics have quality problems.


canon offered two adapters, one that was a weak teleconverter (and with
limited availability) and one that had no optics and was much cheaper,
and that one *did* result in no infinity focus.
 




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