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Re: [OM] Keeper--yes, no, or can't tell?

Subject: Re: [OM] Keeper--yes, no, or can't tell?
From: Wayne Shumaker <om3ti@xxxxxxxx>
Date: Tue, 04 Apr 2023 07:55:56 -0700
At 4/3/2023 03:17 PM, Mike wrote:
><<An interesting article still relevant today I think? before dpreview 
>Hi Wayne,
>Fortunately, Roger's blogs/articles will survive on his site.  That article 
>was 12 years ago and I was fussing because the lens will be used wide open on 
>a 42 megapickle cam with 
>aspirations for a large print if all turns out.  I certainly learned early on 
>that very precise focusing is key to testing and do that manually under 
>highest magnification and then review the images at max mag to be sure have 
>the best sharpness.  
>I really didn't want an obviously weak corner.  It was not a stinker lens as 
>outlier but clearly not top tier. The softness was just visible on my monitor 
>at normal viewing mag and very easy to see at 100%.  My Loxia was definitely 
>decentered but I never use it but stopped down, so didn't bother with the 
>aggravation of an exchange as it would not make difference in any scenario for 
>which I was likely to use it.  Anyways I am happier with the lens and will 
>take better images regardless, because I am happier with the lens.  Could the 
>softness be evened out in post--perhaps, but that is not the point. 

I have received soft lenses. Not many people go to the trouble to test their 
lenses, including me sometimes. I didn't mean to imply you should not. The 
article also indicates the odds. You should try to get a sharp copy, keep 
fussing, but if after 3 tries, that would indicate low probability of finding 
an exceptional copy.

I would avoid getting used lenses, such as on mpb, where a bad copy is more 

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