Hmmm. I didn't think about the varying performance of different lens
versions. My own 24/2.8 is an SC version so that's what's in PTLens'
database. Accommodating different lens versions with MF lenses
shouldn't be difficult. You have to manually select the lens from a
list because they don't identify themselves in the EXIF data which is
what PTLens normally uses. I also have to disable EXIF lens detection
for the Tamron 20-40 since its external definition is "20-40" while it
identifies itself in the EXIF as "21-39"... no automatic match. Tom
Niemann (author of PTLens) says he's never seen that phenomenon before
where the self identification in the EXIF doesn't match the marketing
definition.
Chuck Norcutt
Moose wrote:
> Chuck Norcutt wrote:
>> I will also vouch for PTLens. I've owned it for nearly a year but until
>> just the past couple of days never had lens data for the lenses I use on
>> the 5D. I submitted test images for two OM mount MF lenses (Tokina RMC
>> 17/3.5 and Zuiko 24/2.8) and three EOS mount zooms (Tamron SP
>> 20-40/2.7-3.5, Tokina AT-X Pro 28-80/2.8 and Tokina AT-X Pro 80-200/2.8.
>>
> Oh good. He's loosening up a little form his stated position about MF
> lenses to accomodate those using them on DSLRs
>> Apart from doing corrections automatically according to a lens profile
>> it is also able to correct "mustache" or complex distortion beyond
>> simple barrel and pincushion distortion. That's something that
>> PhotoShop can't do. I wasn't surprised to see mustache distortion in
>> the Tokina 17 or the Tamron 20-40 but was surprised to see it in the
>> Zuiko 24 as well.
>>
> Gary had to say about one of the 24/2.8 SC lenses he tested, "Distortion
> = slight waveforming with slight barrel" And about both MC versions,
> "Distortion = slight waveforming with distinct barrel"
>
> Different descriptives for the same thing, I think.
>
> Moose
>
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