APM Doublet SD Apo 140 mm F/7 FPL53 OTA refractor with 2.5" focuser

APM Doublet SD Apo 140 mm F/7 FPL53 OTA refractor with 2.5" focuser 360° rotatable, with 1:10 micro focusing. Focal lenght 980 mm, resolution 0.83", limit value 12.5 mag, max. useful visual power 280x, backfocus 180 mm.

APM Doublet SD Apo 140 f/7 FPL53 Optical Tube

The new APM 140mm f/980mm Doublet is a mold breaker with high quality. We have painstakingly engineered an optical and tube solution to bring you APM quality at an unheard price. The new 140- SD Apo features a Doublet lens cell using SD glass FPL-53 to maximize performance. Our innovative combination of materials and design has resulted in optical performance far beyond the normal for a telescope of this price. As with all APM telescopes consistency is assured and each telescope goes through an interferometrical test at the 532nm (green) wavelength before shipping.

With 980mm focal length, the 140-SD Apo is an impressive all-rounder. From intricate double star observing to high contrast detailed planetary views, this new scope will introduce a whole new group of Astronomy enthusiasts to APM quality.

Traditional APM quality has been applied in all areas. The new 2.5" focuser is a Rack and Pinion type, with 1:10 focusing. It remains rigid under high loads making it suitable for imaging. The attention to detail extends to areas like the 2" and 1.25" eyepiece adapters. These use a new design of collar clamp, far superior to the common brass compression rings found on lesser designs. Of course, if you would like to use a Starlight Instruments Feather Touch (model FTF3035B-A) then this can be supplied as an option, for that reason the tube end has an thread M109 x 1 and M95 x 1 to accept a 3" or 2.5" Starlight focuser.

Imaging accessories for the 140-980 include a 2.5" (Order Nr. TSFlat2,5) field flattener which maintains focal length. There is also a dedicated Massimo Riccardi designed APM Reducer. This changes the focal length by a factor of x0.75, resulting in a 735mm focal length and fast f5.25 aperture.

With the new 140 mm SD Apo we believe we have created an Apochromatic Refractor of incomparable performance and value in its category.

Delivery contains:

• Optical Tube
• 1 Pair of Tuberings with handle
• 2,5" Focuser with 1:10 Microfocusing
• Losmandy-Style Dovetail
• Shoe for Finderbracket

Specifications

• Type of telescope: Doublet ED-Apochromat
• Lens: Doublet ED Apo with FPL-53 Element
• Color: black / white
• Tube material: Aluminium
• Aperture: 140 mm
• Focal ratio: f/7
• Focal length: 980 mm
• Coating: Multicoated
• Resolution: 0.83"
• Limit value: 12.5 mag
• Max. useful visual power: 280 x
• Backfokus: 180 mm
• Focuser: 2.5" APM Focuser, 360° rotatable, with 1:10 Micro Focusing
• Connection to eyepiece: 2" / 1 1/4" with adapter
• Viewfinder: none supplied
• Tube diameter: 152 mm
• Length during observing: 1030 mm
• Transportation length: 830 mm
• Dewcap diameter: 186 mm
• Length of dewcap: 290 mm
• Tube weight: 19.38 lb incl. Tuberings