Chuck:
Don't have PTLens in front of me, so this may be a dumb question. How do
you know the issue is fixed? Is there an downloadable database? I know I
have been able to select the 24/2.8 and I think in conjunction with
"35mm SLR". Will have to check. Of course, maybe PTLens was doing
nothing....
Martin
-----Original Message-----
From: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx] On
Behalf Of Chuck Norcutt
Sent: Friday, February 22, 2008 4:24 PM
To: olympus@xxxxxxxxxx
Subject: [OM] Re: PTLens bug, was: lightroom vs lightzone vs olymaster
vs olystudio vs ps vs capture 1
Wow! That was fast. The problems described below are already fixed.
One was an error in the database. I don't know what the other was.
Anyhow you can now select the Zuiko 24/2.8 for any full frame SLR even
though you might not be able to actually mount it.
Chuck Norcutt
Chuck Norcutt wrote:
> But lens profiles are based on the film/sensor form factor.
> Therefore, the data I supplied for the 24/2.8 is only usable on full
> frame digital or 35mm film. If you want to use a 24/2.8 on a 4/3
> camera someone will have to submit a separate test. Likewise, it
> could not be used with a Canon small sensor DSLR.
>
> I also discovered a bug in PTLens in that the 24/2.8 profile is not
> accessible to you if you declare that you're using an Olympus 35mm
> film image. All that appears once you've chosen Olympus SLR is DZ
> lenses even though you also say "35mm film". But if you choose Canon
> or Pentax SLR all the 35mm primes in the database are selectable. The
> Olympus related bug also continues further in that, having once chosen
> Olympus SLR and 35mm film if you then go back and change the camera to
> Canon SLR PTLens will go catatonic with respect to distortion
> correction and disable all distortion correction selections. The only
> way out is to exit and restart. But this latter half of the bug only
> occurs on the standalone version and not on the PS plug-in. As a
> practical matter, however, you could tell it that the scanned OM film
> image was really a Canon 5D image. It wouldn't know the difference
> and would allow access to the 24/2.8 profile. Note that PTLens
> requires you to disable camera and/or model # and/or lens type
> detection in the EXIF if you're going to play games with these
paramaters.
>
> I've reported the bug to the author but not heard back yet.
>
> Chuck Norcutt
>
>
> C.H.Ling wrote:
>> Thanks! it is good to know PTLens support the old lenses, the
>> vignetting and CA tools are also interesting, at $15 it seems a good
>> investment.
>>
>> C.H.Ling
>>
>>
>> ----- Original Message ----- From: "Chuck Norcutt"
>> <chucknorcutt@xxxxxxxxxxxxxxxx>
>>
>>> I just answered your question by submitting data for the OM mount
>>> Tokina RMC 17/3.5 and Zuiko 24/2.8 with test data shot on a 5D. The
>>> data was added to the PTLens database only yesterday. I would go
>>> shoot some more OM mount lenses if it wasn't so cold and snowy.
>>>
>>> PTLens advises to shoot test images from a distance of 20-50 feet
>>> and that the data should be good for about 10 feet or further. No
>>> attempt is made for support of anything closer than that.
>>>
>>> Chuck Norcutt
>>>
>>> C.H.Ling wrote:
>>>> PTLens looks interesting but I see some problem for shots at
>>>> different focus distance, like the Zuiko 18/3.5, it has very slight
>>>> pincushion distortion for distance object but high barrel
>>>> distortion at close distance.
>>>> I wonder if PTLens will accept the OM Zuiko wides, since sooner or
>>>> later I will get a 5D successor for my OM lenses ;-)
>>
>>
>> ==============================================
>> List usage info: http://www.zuikoholic.com
>> List nannies: olympusadmin@xxxxxxxxxx
>> ==============================================
>>
>>
>>
>
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List usage info: http://www.zuikoholic.com
List nannies: olympusadmin@xxxxxxxxxx
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List usage info: http://www.zuikoholic.com
List nannies: olympusadmin@xxxxxxxxxx
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