TPO 0.75x Focal Reducer for Ritchey-Chretien Telescopes
Fully multi-coated optics, the Third Planet Optics 2" focal reducer will reduce your focal length by 0.75x shortening exposure times while still retaining a crisp image with excellent color and contrast. Extra long focal length to be perfectly compatible with the TPO RC telescopes, off-axis guiders, and filter wheels and is best for CCD sensors with up to a 15mm diagonal. Two element design effectively reduces focal ratios of the Third Planet Optics Ritchie Chretien from f/9 to f/6.75 and from f/8 to f/6.
- Reduction: Nominal 0.75x
- Size: 2 Inch
- Two Element Design
- Two Year Warranty Included!
|Camera Side Connection||Male M48x0.75|
|Scope Side Connection||2" Nosepiece (housing)|
|Scope Side Connection||Female M48x0.75|
|Warranty||2 Year Warranty|
Best site ever!
Customer service to quality of products...this is the best site!! Bill
My Review Revised
At length, I found this focal reducer not to fit snugly to the CCD camera (a QSI 690 and also an SBIG ST10XME). It fits to the CCD camera via a ring that is ******* into the camera, and then the FR is attached to that - the fit is poor and introduces flexure. I don't use it any more.
RC Focal reducer
Ok with Atik 4 camera. Unable to reach focus with Canon 60Da DSLR, focal plane too far in even with no extender rings.
A well made, solid Focal Reducer
I am using the 2" .75x FR for my Astro-Tech 14" RC, using an SBIG ST10XME - it is a good match. I tried another FR from another vendor and it was poorly made, the t-threads were too deep and it would not fit snugly into the camera. This FR is very well made, fits great into the CCD camera.