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.
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.
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. Fine-focus gearing differs between the source table and prose; see the qualification.
TS-Optics manufacturer documentation
Manufacturer technical table states 1:11 fine gearing; prose states 1:10. Table retained with discrepancy explicit. TSFlat25DEL spacing of 65 mm is specific to the described adapter configuration, not universal 55 mm.
| 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 |
Data sheet
Specific References
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
