Hello All,
(Note: Visually optimized scopes can present a special challenge for imagers or binoviewer
users, as the focal plane is often formed so close to the tube that additional devices cannot
be accomodated. This can be partially resolved with the use of a relay lens or Barlow to "pull"
the image from the OTA, though creating a larger image scale and increased EFR in the process.)
Denkmeier Optical (an AstroMart sponsor) has developed a low-amplification 2" Optical Coupling
System that, while primarily intended to complement their binoviewer line, may provide relief for
"back-focus challenged" scopes as well. Having been fortunate enough to get one of the
first units, I've thrown together a few test shots to illustrate its capabilities.
The below images illustrate the attainable image scale difference, with the foreground
Denkmeier sun using a 2x Powermate shot as a backdrop. Each was an uncropped 3072 x 2048
pixel image (re-sized down to 800 x 533 for web display).
This scope could NOT previously reach focus for imaging without relay lenses/Barlows. The
Denkmeier OCS increased back focus here by approximately 37mm.
More test images and text are posted at:
http://www.astro-nut.com/denkmeier.html
(Note: Visually optimized scopes can present a special challenge for imagers or binoviewer
users, as the focal plane is often formed so close to the tube that additional devices cannot
be accomodated. This can be partially resolved with the use of a relay lens or Barlow to "pull"
the image from the OTA, though creating a larger image scale and increased EFR in the process.)
Denkmeier Optical (an AstroMart sponsor) has developed a low-amplification 2" Optical Coupling
System that, while primarily intended to complement their binoviewer line, may provide relief for
"back-focus challenged" scopes as well. Having been fortunate enough to get one of the
first units, I've thrown together a few test shots to illustrate its capabilities.
The below images illustrate the attainable image scale difference, with the foreground
Denkmeier sun using a 2x Powermate shot as a backdrop. Each was an uncropped 3072 x 2048
pixel image (re-sized down to 800 x 533 for web display).
This scope could NOT previously reach focus for imaging without relay lenses/Barlows. The
Denkmeier OCS increased back focus here by approximately 37mm.
More test images and text are posted at:
http://www.astro-nut.com/denkmeier.html
Attached Image:
