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[OM] Re: Sigma 600mm mirror lens

Subject: [OM] Re: Sigma 600mm mirror lens
From: "C.H.Ling" <chling@xxxxxxxxxxxxx>
Date: Mon, 18 Jul 2005 21:05:36 +0800
----- Original Message ----- 
From: "Andrew L Wendelborn" <andrew@xxxxxxxxxxxxxxxxxx>

> At 8:03 PM +0800 2005.07.18, C.H.Ling wrote:
>>300/4.5 has quite high chroma, I got less chroma with Zuiko 500/8 than
>>300/4.5, not to talk about with 2x.
>>
>
>
> Interesting comment. Do you mean chromatic aberration?
>

Yes, some years ago I did some test on Zuikos and found a single coated 
300/4.5 has very visible chromatic aberration on bright light bulb, I just 
though the sample I had was having some problem or the SC glasses was not 
that good. Recently I took some shoot with my 300/4.5 MC and found the edges 
of bright white area has similar problem but at the same time my Zuiko 500 
was free from any chroma.

C.H.Ling 



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