If you want to connect your camera (without an Off-Axis Guider) to an RCC through a T-Ring, we'd recommend a VariLock 46 T-2 extender (2956946 #25V) with an engraved half-millimeter scale, so that the ideal distance between the camera chip + T-Ring and the RCC can be produced quickly even at e.g.
The Rowe Coma Corrector does exactly what its name implies it corrects the coma (aberration) which would naturally be observed in the images from Newtonian telescopes. This is a superb, specialized product that enhances the imaging experience. The Baader Planetarium Rowe Coma Corrector lens was built for Newtonian telescopes that have a Long Working Distance. Spotting Scopes, Binoculars & Monocularsīaader Rowe Coma Corrector for Newtonians.Not bad but still noticeable under 200% zoom. Stars at the very outer edges are still a tiny bit out of shape.
#Newtonians full#
I say it covers maybe 85 to 90% of full frame area. One last thing, the flattener doesn't fully cover a full frame sensor. Little bit of a pain but I'm happy I got it to work for astrophotography. So half my tube build was inside the focusing tube and half my spacers are sticking out. I had to end up putting the flattener to a m48 to 2 inch mounting adapter (2 Inch to M48*0.75 Astronomical Telescope Eyepiece Lens Camera T Adapter Ring for Astronomical Photography ) and then add enough spacers and T ring behind the the adapter to achieve focus. This field flattener needs to be inserted into the focusing tube like a barlow lens while still have to maintain proper distance of 75mm from the rear objective lens to the camera sensor. Lack of instruction for astrophotography is a little bit of a pain. For complete warranty details contact us at 80. This warranty is for the benefit of the original retail purchaser only.
Warranty note: Limited Warranty against defects in materials or workmanship for one year from date of purchase. The optics are fully multi-coated for maximum light throughput. The 2" Photo-Visual Coma Corrector produces a 1.1x magnifying factor. Some users report that adding 0.75" (19mm) of spacing between the upper housing and optical nosepiece allowed perfect focus with their wide-field eyepieces. For astronomical cameras additional spacing will be required, the amount of which can be determined by factoring in your camera's sensor position relative to its front flange.įor visual use some additional spacing may be required for certain eyepieces.
For DSLR use you'll need a 20mm spacer ring (sold separately) to achieve proper image focus. The Coma Corrector's back focus is about 75mm. The third component is an M48-to-T2 (M42) adapter ring, which is useful when using the Coma Corrector for astrophotography.įor astrophotographic use, you unthread and set aside the upper housing and use only the optics-containing nosepiece. The bottom of the nosepiece is threaded for Orion 2" filters. The eyepiece holder has a non-marring brass compression ring and two thumbscrews.
The optics are contained in a 2" nosepiece, which is threaded into the upper housing that features an eyepiece holder for 2" eyepieces. The 2" Photo-Visual Coma Corrector works for astrophotography as well as for visual observing with an eyepiece. This coma corrector greatly reduces this effect as well as the effects of field curvature, rendering sharp stars across the entire field of view or image frame. Coma appears as flared, comet-shaped stars and gets progressively worse farther out from the center of the field. The Orion 2" Photo-Visual Coma Corrector for Newtonians minimizes the coma inherent in fast Newtonian reflectors with focal ratios from f/3.5 to f/6. Conquer coma and enjoy images with sharp stars across the entire field of view or photographic image frame in your fast Newtonian reflector with the Orion 2" Photo-Visual Coma Corrector.
0 kommentar(er)
