Jeff, your 300mm image is very much out of focus, this does not appear
to
be due to atmospheric effects. Especially in Alaska! With my Tokina
800mm lens,
atmospheric effects only seem to be a problem during hot or hazy days,
in cool
clean air, there are no problems.
Together with the behaviour you describe, I think your camera or lens is
somewhat severely mis-focusing. Try with another lens to rule out
camera body?
On 26 Jun 2009, at 8:24 AM, Jeff Keller wrote:
> Looking closely at the snow in the lower left corner it looks like
> there
> could be vertical movement during the exposure ... but at 1/2500
> shutter
> speed? Maybe fog rising up from the snow?
>
> I haven't used the 70-300 but I think there is something wrong - it
> is a
> soft image. It seems too soft for any reasonable quality lens.
>
> Jeff Keller
>
> -----Original Message-----
> From: Lawrence Woods [mailto:lmwoods@xxxxxxx]
> Sent: Thursday, June 25, 2009 10:04 PM
> To: olympus@xxxxxxxxxxxxxxxxx
> Subject: [OM] Mt McKinkey (Denali) and an Infinity focus question
>
>>>
> 70-300 lens @ 300mm, f/5.6, 1/2500 ISO 200
> http://users.rcn.com/rmwoods/OM/P6150178_1K.jpg
>
>>>
> The 300mm picture is something of a disappointment in terms of
> sharpness and contrast. Is this just in the nature of a 600MM
> FOV and the accumulated atmosphere between the subject and me?
> Or would stopping down have helped?
>
>
>
> ----- Larry Woods
> lmwoods@xxxxxxx
>
> --
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