TS-Optics Photoline 80 ED Triplet OTA This 80 mm FPL53 air-spaced triplet has a 480 mm focal length and f/6 focal ratio. It is intended for visual astronomy and astrophotography with the appropriate camera train.
Manufacturer model: TS-Optics Photoline 80 ED Triplet OTA · Specifications checked against manufacturer data on 2026-11-04
This 80 mm FPL53 air-spaced triplet has a 480 mm focal length and f/6 focal ratio. It is intended for visual astronomy and astrophotography with the appropriate camera train.
Focusing and mechanical design
The 2.5-inch RAP focuser has 75 mm travel, a 5 kg accessory rating and M63/M68 female threads. The aluminium tube measures 375 mm with the dew shield retracted or 435 mm extended.
Imaging configuration
A matched corrector is optional for flat stars across a large sensor. In the stated TSFlat25DEL configuration the M48-to-sensor spacing is 65 mm, rather than a universal 55 mm.
Compatibility notes
TSFlat25DEL spacing of 65 mm is specific to the described adapter configuration, not universal 55 mm.
Additional specifications
Objective design
apochromatic triplet with FPL53 element
Tube length with retracted dew shield
375 mm
Tube length with extended dew shield
435 mm
Thread between tube and focuser
M86x1 female thread on the tube side (only important when exchanging focuser)
Dew shield design
retractable
Connections on the eyepiece side
M63x1 and M68x1 female thread, 2" and 1.25"
Maximal load of focuser
5 kg
Drawtube travel
75 mm
51021
Data sheet
Aperture
80 mm
Backfocus
135 mm from the 2" connection and 170 mm from the female M68 thread
Coating
fully multi-coated
Dew shield diameter
103.3 mm
Focal length
480 mm
Focal ratio
f/6
Focuser
2.5" RAP with 1/11 dual speed, reinforced plain bearings
Manufacturer listed equipment
80/480 mm triplet apo CNC aluminium tube with rings and dovetail bar 2.5" RAP focuser with dual speed transmission and 1.25" reducer Finder shoe (mounted) TS Star Test
Manufacturer part number
TLAPO804-OT
Model
TS-Optics Photoline 80 ED Triplet OTA
Tube diameter
89 mm
Tube material
aluminum
Tube weight
3.14 kg with tube rings
Specific References
MPN
TLAPO804-OT
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TS-Optics Photoline 80 ED Triplet OTA This 80 mm FPL53 air-spaced triplet has a 480 mm focal length and f/6 focal ratio. It is intended for visual astronomy and astrophotography with the appropriate camera train.
Manufacturer model: TS-Optics Photoline 80 ED Triplet OTA · Specifications checked against manufacturer data on 2026-11-04
