Non SMC lenses

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sam-joseph

Link Posted 23/12/2009 - 09:28
Hello chaps,
I'm expecting a Takumar 135mm lens to arrive any day now, and after reading some negative reviews after my winning bid, I'm a little concerned about the non-SMC issue. I was wondering if the absence of lens coatings can be improved by using a filter of some sort? UVA or B for example? In short, is there a screw in filter that can compensate for the non SMC glass? I welcome your expert opinions.
Regards.
Sam-Joseph
Pentax K7, Sigma 17-70 f2.8-4.5, Sigma 70-200 f2.8 APO EX, Sigma 70-300 APO, Sigma 1.4x TC, Vivitar 2x TC. Takumar 135mm f2.5, SMC Pentax A 50mm 1:1.7, SMC Pentax -M 1:4 200mm, Pentax X70

hefty1

Link Posted 23/12/2009 - 11:21
Short answer; no.

A filter won't help as it will add an extra glass surface for light to flare off, hence it'll only tend to make things worse.

A lens hood, on the other hand, will do wonders for flare by stopping light reflections striking the lens in the first place.

In summary: Buy a good hood and don't point your lens directly at your light source (the Sun usually) and you'll be fine.
Joining the Q

Anvh

Link Posted 23/12/2009 - 11:27
It's not the UV that it blocks that you want a coating but it makes the light travel easier into the lens.
A filter with a coating will not help you with that I believe.
Stefan


K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ

johnriley

Link Posted 23/12/2009 - 14:30
The Takumar (bayonet) lenses are coated, but with conventional coatings as opposed to the SMC variety. All lenses are coated in some way or another, otherwise the contrast would be very low.

A lens hood is indeed the most useful accessory and the lens will be fine.
Best regards, John

sam-joseph

Link Posted 23/12/2009 - 19:25
Thanks for the info guys.
If I didn't worry so much about my gear, I'd have more time to use it.
Merry Christmas all. I've enjoyed contributing to this site over the last few months, (even though, sometimes the conversations are somewhat volatile) and I'm looking to forward to more of the same next year.
Regards
Sam-Joseph
Pentax K7, Sigma 17-70 f2.8-4.5, Sigma 70-200 f2.8 APO EX, Sigma 70-300 APO, Sigma 1.4x TC, Vivitar 2x TC. Takumar 135mm f2.5, SMC Pentax A 50mm 1:1.7, SMC Pentax -M 1:4 200mm, Pentax X70
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