ASA, also known as Astro Systeme Austria has developed the ASA 20" F/3.8 NG Astrograph Open Truss Optical Tube Assembly (OTA) which is an excellent starting point for the amateur astronomers who strive to do astro-imaging and wish to configure a custom system. The ASA OTA is a great example of a fast and wide field optical imaging system great for high quality imaging and also capable of working at multiple focal lengths.

Stability and trans-portability are key with a good mount and that is exactly what ASA had in mind with their DDM85XL Premium Direct Drive Mount! Since this is the premium version in the DDM85 mount series, it has a payload of 220 Ibs! With built in 85mm thick hollow axles, massive tapered roller bearings, motors with high torque with excellent control, and accurate encoders, this is a must have for professional amateur astronomers! The carbon fiber outer case also gives it a unique appearance among mounts. All parts crucial for a direct drive GoTo mount are included with proper use of the right external computer and software.

This ASA Stainless Steel Counterweight is the counterweight that should be used with the ASA Direct Drive 160 Mount.

Your ASA Astrograph Telescope is a serious investment and that's why you should take protecting your investment seriously.

Do you want to mount your ASA Astrograph Telescope with genuine parts? Then you'll need the ASA Astrograph Telescope Tube Rings.

When utilizing a Ritchey-Chretien telescope system, it should be utilized with a field-flattening accessory lens to accomplish a bigger useful field of view over a truly flat image plane.

Stability and trans-portability are key with a good mount and that is exactly what ASA had in mind with their DDM60 Direct Drive Mount! With built in 60mm thick hollow axles, massive tapered roller bearings, motors with high torque with excellent control, and accurate encoders, this is a must have for professional amateur astronomers! The carbon fiber outer case also gives it a unique appearance among mounts. All parts crucial for a direct drive GoTo mount are included with proper use of the right external computer and software.

The corrector is optimized for CCDs with a diameter of 30 mm (APS-C Format); however, this can be extended to up to 40 mm with some minor loss of performance and increased vignetting.

ASA has developed a fantastic line of high quality Cassegrain Telescopes perfectly geared for extensive research or high level astro-imaging. The ASA 600mm f/9 is a fast high quality classical optical system that uses a perforated parabolic primary mirror to form the image behind the cell and uses the hyperbolic secondary mirror for focusing by moving it along its axis via a computerized electrical drive system.

Stability and trans-portability are key with a good mount and that is exactly what ASA had in mind with their DDM85 Direct Drive Mount! With built in 85mm thick hollow axles, massive tapered roller bearings, motors with high torque with excellent control, and accurate encoders, this is a must have for professional amateur astronomers! The carbon fiber outer case also gives it a unique appearance among mounts. All parts crucial for a direct drive GoTo mount are included with proper use of the right external computer and software.

This Tube Sing Ring by ASA is designed to be an accessory for the 20" Truss Astrograph. It is made of CNC aluminum material.

Your ASA Astrograph Telescope is a serious investment and that's why you should take protecting your investment seriously. The AstroSysteme Austria Flight Case was designed with your ASA telescope in mind - be it transporting it from your vehicle to an observing site or across the world in an airplane.

This ASA Stainless Steel Counterweight is the counterweight that should be used with the ASA Direct Drive 85 Mount.

Do you want to mount your ASA Astrograph Telescope with genuine parts? Then you'll need the ASA Astrograph Telescope Tube Rings.

At the point when utilizing an established Cassegrain telescope system, it ought to be utilized with a field flattening accessory to accomplish a bigger helpful field of view.

ASA, also known as Astro Systeme Austria has developed the ASA 12" F/3.8 model-12N Astrograph Optical Tube Assembly (OTA) which is an excellent starting point for the amateur astronomers who strive to do astro-imaging and wish to configure a custom system. The ASA OTA is a great example of a fast and wide field optical imaging system great for high quality imaging and also capable of working at multiple focal lengths.

ASA has developed a fantastic line of high quality Ritchey-Chretien Telescopes perfectly geared for extensive research or high level astro-imaging. The ASA 500mm f/8 is a fast high quality optical system that uses a hyperbolic primary mirror to form the image behind the cell and uses the secondary mirror for focusing by moving it along its axis via a computerized electrical drive system. These optical systems are similar to Cassegrains, but has improvements in the field correction even without a field-flattener lens being used.

To correct the field of view ASA uses the correctors designed by Dipl. Phys. Philipp Keller. All correctors have sufficient backfocus to be connected to all popular camera systems.

This ASA DDM85 Counterweight Shaft - Long was designed specifically to the the ASA Direct Drive 85 Mount.