GSO 2" 90-deg 99% Dielectric Mirror Diagonal for SCTs
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- Premium 2" diagonal with durable dielectric coatings for long lifetime
- 99% reflectivity across visible spectrum and 1/12-wave BK7 mirror for bright and true images
- All-metal body with SCT barrel
- Comes with 2"-1.25" eyepiece adapter for maximum flexibility
- Includes foam-fitted storage box and end caps
GSO's 2" SCT diagonal features dielectric coatings with 99% reflectivity across the visible spectrum and a 1/12 wave BK7 mirror. The all metal diagonal body is CNC machined. The combined result is a superb diagonal offering excellent mechanical and optical quality at a great price. Dielectric coatings are more durable than regular or enhanced aluminum coatings, so you will enjoy years of excellent performance from this product. Diagonals with comparable quality and specifications often sell for $150 or more in today's astronomy market.
You can attach this diagonal directly to Schmidt-Cassegrain telescopes and many Maksutov-Cassegrain telescopes, as long as there is a SCT male thread on the telescope. The standard SCT thread is a 2"x24tpi thread.
A 1.25"-2" adapter is included so you can use this diagonal with 1.25" or 2" eyepieces. The 1.25" and 2" holders both feature a brass compression ring, so your eyepiece barrels will not be scratched by the set screw. The 1.25"-2" adapter is also threaded to accept 2" filters. The clear aperture is 38.2mm.
The diagonal comes in a very nice foam-fitted storage box and includes 2 end caps. Weight = 1lb-4oz. (with 1.25" adapter); 1lb-1oz. (without 1.25" adapter). Made in Taiwan.
Please note: Even though the eyepiece holder and the SCT adapter of this diagonal have standard SCT (2"x24TPI) threads that will work with other SCT threaded items, the threads on the body of the diagonal are NOT standard SCT threads. The thread diameter on the diagonal body is 2" but the thread pitch is very slightly different (not 24TPI) and has not been specified. GSO ensures that these components that they machine fit together, but SCT-threaded adapters from other brands will not thread on properly or at all to GSO's 2" diagonal bodies in most cases due to this marginally different thread pitch.
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Hide Found a better Shipped Price on Frontend? | No |
- Premium 2" diagonal with durable dielectric coatings for long lifetime
- 99% reflectivity across visible spectrum and 1/12-wave BK7 mirror for bright and true images
- All-metal body with SCT barrel
- Comes with 2"-1.25" eyepiece adapter for maximum flexibility
- Includes foam-fitted storage box and end caps
GSO's 2" SCT diagonal features dielectric coatings with 99% reflectivity across the visible spectrum and a 1/12 wave BK7 mirror. The all metal diagonal body is CNC machined. The combined result is a superb diagonal offering excellent mechanical and optical quality at a great price. Dielectric coatings are more durable than regular or enhanced aluminum coatings, so you will enjoy years of excellent performance from this product. Diagonals with comparable quality and specifications often sell for $150 or more in today's astronomy market.
You can attach this diagonal directly to Schmidt-Cassegrain telescopes and many Maksutov-Cassegrain telescopes, as long as there is a SCT male thread on the telescope. The standard SCT thread is a 2"x24tpi thread.
A 1.25"-2" adapter is included so you can use this diagonal with 1.25" or 2" eyepieces. The 1.25" and 2" holders both feature a brass compression ring, so your eyepiece barrels will not be scratched by the set screw. The 1.25"-2" adapter is also threaded to accept 2" filters. The clear aperture is 38.2mm.
The diagonal comes in a very nice foam-fitted storage box and includes 2 end caps. Weight = 1lb-4oz. (with 1.25" adapter); 1lb-1oz. (without 1.25" adapter). Made in Taiwan.
Please note: Even though the eyepiece holder and the SCT adapter of this diagonal have standard SCT (2"x24TPI) threads that will work with other SCT threaded items, the threads on the body of the diagonal are NOT standard SCT threads. The thread diameter on the diagonal body is 2" but the thread pitch is very slightly different (not 24TPI) and has not been specified. GSO ensures that these components that they machine fit together, but SCT-threaded adapters from other brands will not thread on properly or at all to GSO's 2" diagonal bodies in most cases due to this marginally different thread pitch.
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Hide Found a better Shipped Price on Frontend? | No |