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

[Jim Hemenway]

Thanks Ole:

So it is chromatic abberation after all.

Jim - http://www.hemenway.com



Ole Tjugen wrote:

> 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