Re: [APML] Presbyopia and Fine Focus

["D. Kodama" <kodama@alumni.caltech.edu>]

Jim & Kent,

I believe the knife-edge focusers that Hutech sells (Mitsuboshi) have a
c-mount thread and use c-to-camera bayonet adapters which are available
from camera stores.  So you don't have to buy the second part from Hutech.

If you are calibrating the KEF for a digital camera, you should use the
nominal spacing spec'd by the manufacturer.  I'm sure Hutech (Ted
Ishikawa) would tell you what the figure should be for Canon cameras which
he sells.  For Nikon, it should be the same as the nominal number for
Nikon film cameras.

Dave K.
(yes, I have a D70s but no, I still use film for deep sky astrophotos)

>
> In a message dated 7/27/05 9:31:08 AM, deepskyphotos@hotmail.com writes:
>
>
>> I'll have to look into that.  I wonder what the cost of
>> the bayonet switch might be.
>> Anyone at Hutech listening in?
>>
>> Jim Vineyard
>>
>
> Jim:
> I believe that to change the camera mount type costs something like $35.
> You would then have to recalibrate the KEF.
> You can do this yourself if you have a digital depth gauge and is
> explained
> on the Hutech website.
> The only problem with calibrating a DSLR is that the chips have a cover
> slip
> over the chip and you are unable to actually get to the chip surface
> (which
> you wouldn't want to anyway).
>
> Kent Kirkley
> _______________________________________________
> Astro-Photo mailing list
> Astro-Photo@seds.org
> http://seds.org/mailman/listinfo/astro-photo
>

_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo