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Product Specifications:  SVR90T-25SV Raptor Apochromatic Triplet

 

Description

Options (extra cost)

Objective

90mm diameter, 630mm focal length (f7), apochromatic triplet with Ohara FPL-53 center element

 

Tube Assembly

SVR90T Raptor: Carbon fiber tube and dew shield
SV90T: Aluminum tube and dewshield, Instrument White Powdercoating

 

Dimensions

OTA: 19 1/2” long, 3 1/2” diameter; 22” long with dew shield extended

 

Weight

SVR90T Raptor: 6.8 lbs.  Rings weigh additional 1/2 lb each
SV90T: 7.5 lbs. Rings weigh additional 1/2 lb each.

 

Dewshield

SVR90T Raptor: 4.5” diameter retracting carbon fiber dewshield
SV90T: 4 7/16” diameter aluminum dewshield

 

Focuser

2 1/2” dual speed Stellarvue rack and pinion focuser with refractor break, with compression ring and  1 1/4” compression ring adapter

Upgrade to 2.5” Feather Touch focuser for $400 additional.

Finder

Optional

  1. Red Dot Finder F1001/F1001C
  2. Multi-retical Finder F2/F2A
  3. Optical Finder F50M2/R50A

Rings

Aluminum CNC machined hinged rings (R90). Five 1/4-20 threaded holes on top and bottom - a center hole and two sets spaced 1.5” and 60 mm respectively. Use either a Vixen TP14 rail or a Losmandy TP6 plate.  NOTE:  CNC clamshell can be substituted for the dual rings at no additional cost

 

Case

C18 heavy duty ultimate travel case

 

Diagonal

Optional

  1. Stellarvue 2” dielectric diagonal UD2

Field Flattener

Optional. We recommend the Starlight Instruments 2.25” riser when using the SFF7-25.

  1. SFF7-25 threaded for APS chips
  2. SFF3-25 threaded for large chip cameras

Backfocus

175.5 mm threaded, 157 mm with 2” adapter.

 

Light Gain

165x (human eye = 1)

 

Theoretical Resolution

1.3 arc sec (Dawes Limit)

 

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