[OM] Re: WTB a lens to replace the other

[Jeff Keller]

Probably any mirror lens you are likely to use for terrestrial
photography will have donuts when there are bright out of focus
objects in the field of view. C.H. had posted an image of cigarette
smoke showing many donuts that was quite nice.

The biggest problem I've seen with donuts is bright reflections from
water. Bright donuts floating in a lake don't look nice. The other two
things to keep in mind are that mirror lenses seldom match the
contrast of a refracting lens and the mirror lens is focused at the
same aperture as the picture is taken. Focus is critical.

-jeff


On 3/2/07, Allen Coltrin <hjlantern@xxxxxxx> wrote:
>
> Did you notice any donut effects?
>
> Allen

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