[LargeFormat] Keep the list alive! - Off Topic - 6x6cm

[Ole Tjugen]

It's pretty obvious on the lighthouse in the blowup, and it looks loik 
chromatic aberration to me.

I'm not surprised that there will be visible differences between an Arsat and 
a Zeiss Distagon.

Ole Tjugen

>===== Original Message From Brock Nanson <brock@nanson.org> =====
>Jim,
>
>I can barely see what you're referring to in the lighthouse blow-ups.
>However, my guess is it's caused by the scanner.  You're getting in
>pretty darned close, so you could be getting a similar effect to what
>you see when you put your nose on your 32" television.  The RGB sensors
>don't line up perfectly in a scanner, so sometimes detail gets
>'adjusted' to suit the way the scanner sees things.
>
>Could be wrong, just an idea.  As for why you see it in one only?  No
>idea!  Unless it is the lens...
>
>Brock
>
>
>Jim Hemenway wrote:
>
>> Hi Folks:
>>
>> Some of you folks know a lot about optics, so I'm wondering if anyone
>> can tell me if chromatic aberration is the name for the green and red
>> stripes on the sides of the lighthouse in the first picture in the set
>> below.  Look for the blow-up under the Boston Harbor photo on the left
>> side of the pair.
>>
>> If it is chromatic aberration, why does it show up one one fisheye lens
>> and not the other?  Is there a missing element?
>>
>> These are some side-by-side fisheye photos taken with the Arsat 30mm on
>> a Kiev 60, and the Zeiss F-Distagon 30mm on a Rollei 6008i.
>>
>> When you click on any of them you'll be presented with large photos. If
>> you press your right mouse button, (in Netscape 7.1) and choose view
>> image, the photo(s) will be reduced in size to fit your screen. I think
>> that something similar is available in IE.
>>
>> Astia 100
>>
>> Most at f8 - f16
>>
>> No sharpening
>>
>> No PS work except for spotting.
>>
>> http://www.hemenway.com/ArsatDistagon
>>
>> Thanks,
>>
>> Jim Hemenway
>
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