DFM Engineering, Inc.
1035 Delaware Ave. Unit D
Longmont, CO 80501
Phone: 303-678-8143
Fax: 303-772-9411



• Our typical 0.8M Classical Cassegrain has an F/3 primary mirror with an effective focal ratio between F/8 and F/18. The 125 mm field is fully shielded and unvignetted.

• Both primary and secondary mirrors have a near zero expansion substrate

• Back Focus is 28 cm from mounting surface
• 2 variable, low voltage power outlets for reticles provided on optical tube assembly

• 2 AC power outlets on optical tube assembly

• Finderscope: 5 in F/9 with 2 in. dia, 32 mm focal length eyepiece and projection reticle


• 30 in. diameter friction drive in RA and 28 in. diameter friction drive in DEC

• Open structure optical tube assembly affords better "seeing"

• Steel mirror cell with multiple 12-bolt patterns per KPNO standard

• Tracking accuracy: +/- 0.5 arc seconds in 5 minutes, +/- 5.0 arcseconds in 1 hour

• Pointing accuracy (with refraction and alignment correction) better than 30 arc seconds RMS

• 4 deg./sec. slew rate

• Variable set, guide and tracking rates: 0 to 4 deg./sec.

• Epoxy paint for durable, functional appearance

• Supports 100 kg instrument load with CG 36 cm behind mounting surface

research telescope

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Standard Classical Cassegrain

Custom Telescopes

Telescope Control Systems (TCSGalil™)

Telescope Optics

Equatorial Fork Mount

Observatory Dome and Pier