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Re: [OM] A wasted effort

Subject: Re: [OM] A wasted effort
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Tue, 17 Mar 2009 11:17:38 -0400
Hmmm.  You're quite right.  The now famous vent fan louvers are nowhere 
near being resolved in either image.  But I've forgotten now what we 
were originally comparing.  The 90/2 was in there somewhere.  Are we 
comparing apples and oranges due to different focal lengths?

Chuck Norcutt

C.H.Ling wrote:
> I just avoid mentioning it, but as you have asked.... this is the best image
> I got with a fixed 50mm lens (I didn't test the 50/1.4 at F4 or below), it
> is...
> 
> Even better than the famous 50/2 macro at F4 (and this macro is like new):
> 
> http://www.accura.com.hk/temp/50M2F4.jpg
> 
> May be the 50/3.5 at F5.6 come close:
> 
> http://www.accura.com.hk/temp/5035F56.jpg
> 
> BTW, I found most fixed Zuiko reach its max performance at 2 stops from max
> aperture. Further stop down does not improve much.
> 
> C.H.Ling
> 
> ----- Original Message ----- 
> From: "Chuck Norcutt"
> 
>> Why do I have to blame the camera?  Why can't I blame the lens
>> performance at f/2.8?
>>
>> Chuck Noructt
>>
>> C.H.Ling wrote:
>>> To add more fun to the discussion, here is a shot with 50/1.4 at F2.8 on
>>> E-3.
>>>
>>> E-3 RAW converted with Oly RAW, sharpness -2, NR: off
>>>
>>> http://www.accura.com.hk/temp/50mmF28.jpg
>>>
>>> The 90/2 at F22 shot still look better. Ok, you can blame the strong AA
>>> filter on E-3 :-)
>>>
>>> C.H.Ling
>>>
>>> ----- Original Message ----- 
>>> From: "Moose"
>>>
>>>>> But why have a 21MP camera if your happy with 4?
>>>> I'm not quite convinced that the theoretical charts agree with practical
>>>> experience. The subjects are complex, the lenses are complex and the
>>>> releation of lens to sensor still a bit murky. I've done tests where
>>>> more MPs in the same size actually resolve less than fewer.
>>>>
>>>> While the theory is generally correct, I'm not sure it plays out that
>>>> simply in practice. C.H.'s f22 image lookslmore like 6+ MP to me than 4.
>>>> ........
>> -- 
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>>
> 
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