Product Details » Optical Tube Assemblies (OTAs)
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Optional Accessories

Versa108 ED with FF 
# 6102FF

Temporarily out of stock

Versa 108 ED APO with Field Flattener

Enhanced by the world's most advanced optical design and cutting-edge optical processing, this double air-spaced 108mm Apochromatic doublet refractor offers a versatile platform that delivers exceptional performance for both visual observing and astrophotography.  With outstanding color correction and crisp imaging you'll be able to view beautiful images through your eyepiece, CCD camera, or DSLR camera.
Also included is a field flattener not normally sold with this class of OTA.




Focal Length




Lens Type

2 elements Air-spaced
ED S-FPL51+S-NBM51 glass


2 ", 360° Rotatable 1:11 Crayford dual speed focuser

Tube Length

535 mm (Fully Retractable)

Tube Weight

12 lbs.

Accessories Included

114 Tube ring + 1.25" Adapter brass compressing ring


High quality aluminum case

Case Dimensions

30” x 8.9” x 9”

Gross Weight

23.1 lbs


Versa108 ED with FF 
# 6102FF
    OTA Features
    • Double air-spaced Extra-low Dispersion(ED) objective lens
    • Precision CNC machined all-metal construction
    • Focal length: 648mm, f6    
    • 11:1 dual-speed Crayford-style focuser with 360 degree rotation
    • Graduated scale mark
    • Retractable dewshield
    • High quality power painted finish

    Field Flattener Features
    • Fully multi-coated two element lens (Ohara S-BLS7)
    • Suitable for f/5 to f/7 refractors
    • T-ring thread for most 35mm cameras
    • External anodized gloss finish
    • Internal surface matte finish for reduced glare
    • Suitable for 2 inch fliter (Inner thread M48 x 0.75mm)
    • Made with high accuracy machining
    Also includes hard case for added protection.

Versa108 ED with FF 
# 6102FF

Versa108 ED with FF 
# 6102FF

Versa108 ED with FF 
# 6102FF