Relative to a conventional refracting lens it probably does have reduced
contrast. But compared to all of its competitors in the Modern Photo
mirror lens tests it's the very best for contrast with 58% at center and
even holds 55% at the edge. However, it pays the price for that in that
it has the second highest edge falloff at 0.8 stops. Both effects are
likely caused by using a smaller secondary mirror than the competitors.
Unfortunately, you can't have your optical cake and eat it too. :-)
Chuck Norcutt
On 2/15/2011 2:26 PM, bill pearce wrote:
> It's been quite sometime since I used it, but I remember the Zuiko 500 as a
> little lacking in contrast.
>
> Bill Pearce
> ----- Original Message -----
> From: "Jeff Keller"<om-list@xxxxxxxxxxx>
> To: "'Olympus Camera Discussion'"<olympus@xxxxxxxxxxxxxxxxx>
> Sent: Tuesday, February 15, 2011 12:42 PM
> Subject: Re: [OM] Zuiko 500/8 mirror
>
>
>> I find the f8 lenses difficult to focus. I've missed focus with it mounted
>> on a tripod and having plenty of time to focus. IIRC a list member posted
>> a
>> sharp picture taken with one hand held, in a rain forest, while in a
>> canoe.
>>
>> The faster catadioptric lenses are fairly easy to focus: Celestron 750/6,
>> Vivitar 450/4.5, Tamron 350/5.6. Donut bokeh and low contrast have to be
>> watched for.
>>
>> If I'm going to be taking pictures of distant moving objects (birds, bugs,
>> people) I accept handling the weight and size of a Tamron 400/4
>> conventional
>> lens. If I want to carry a long lens for "just in case", I will take a
>> catadioptric lens.
>>
>> Using 10x live view on a digital camera would probably solve the focus
>> issue
>> leaving the donut bokeh for highlights as the main concern.
>>
>> Jeff Keller
>>
>> -----Original Message-----
>> From: Nicholas Herndon [mailto:nherndon@xxxxxxxxx]
>> Subject: [OM] Zuiko 500/8 mirror
>>
>> Anyone have one? How useful do you find it?
>> --
>>
>>
>>
>> --
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>
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