My Gear

An inventory of most of my gear, at least the gear which I use most.

OTAs | Mounts | Eyepieces | Cameras

Optical Tube Assemblies (OTAs)

Focal Ratio or f/stop is the focal length divided by the aperture.
A scope with a focal length of 700mm and an aperture of 80mm has a focal ratio of 700mm/80mm = 8.75

Determining Magnification: Telescope Focal Length / Eyepiece Focal Length
For example a 19mm eyepiece in the 8 SCT which has a focal length of 2032mm: 2032mm/19mm = ~107x

AT66ED, Stellarvue 80mm, SVBONY SV106 all connected up.

Manufacturer: AstroTech
Model: AT66ED
Type: Refractor
Aperture: 66mm
Focal Length: 400mm
Focal Ratio: f/6
Weight: ~4 lbs

Manufacturer: Stellarvue
Type: Refractor
Aperture: 80mm
Focal Length: 700mm
Focal Ratio: f/8.75
I got this used, it’s a great scope especially for visual observing. Fantastic on Jupiter and Saturn.

Manufacturer: Celestron
Model: SCT 8
Type: Schmidt-Cassegrain
Aperture: 8″ (203mm)
Focal Length: 2032mm
Focal Ratio: f/10
Weight: ~13 lbs

Manufacturer: Celestron
Model: SCT 6
Type: Schmidt-Cassegrain
Aperture: 6″ (152mm)
Focal Length: 1500mm
Focal Ratio: f/10
Weight: ~9 lbs

Manufacturer: SVBONY
Model: SV106 Guide Scope
Type: Refractor
Aperture: 60mm
Focal Length: 240mm
Focal Ratio: f/4
Weight: ~1.7 lbs


Celestron CG5 Advanced GT
Type: Equatorial
Control: NexStar Hand Controller
Payload: 30 lbs
My work horse… I have two of them. Will likely upgrade one day, but for now they handle most of what I throw at them.

Stellarvue M1
Type: Alt/Az
Control: Manual
Payload: 25 lbs
Got this mount when I purchased the Stellarvue 80mm. Light, great grab and go. Handles my AT66ED and my Stellervue 80mm refractors well, also works great with my 6″ SCT.


My Gear - Eyepieces

Tele Vue Nagler (82 degree Apparent FOV)
7mm, 9mm, 13mm 16mm

Tele Vue Panoptic (68 degree Apparent FOV)
19mm, 22mm
The 19mm Panoptics is probably my favorite.

Tele Vue Radian (60 degree Apparent FOV)

Williams Optics SWAN (72 degree Apparent FOV)

SWA (70 degree Apparent FOV)

Astro-Tech Series 6 Wide Field
8mm, 12mm, 17mm
Not sure what the apparent FOV is on these. They were inexpensive and are no longer available, but these are great for planetary viewing.


Determining optimal sub-exposure length
Where R = camera read noise and P = light pollution rate

SVBONY SV305 2MP CMOS Color Camera
Sensor: 1/2.8″ CMOS IMX290
Resolution: 2 Mega Pixels 1920X1080
Pixel Size: 2.9 µm X 2.9μm
Read Noise: .7e-
Max Exposure: 1800 seconds
Weight: ~0.3 lbs
SVBONY SV305 Camera on the AstroTech AT66ED

Atik Titan CCD Mono Camera
Sensor: Sony CCD ICX424
Resolution: 658×492
Pixel Size: 7.4 µm x 7.4 µm
Guide Port: ST4
Weight ~0.7 lbs
This is an older camera and has been discontinued.

Orion StarShoot Auto Guider
Sensor: Micron MT9M001 CMOS
Resolution: 1280 x 1024
Pixel Size: 5.2 µm x 5.2 µm
Guide Port: ST4
Weight: 4.4 oz