TS-Optics Photoline 115 ED Triplet OTA This 115 mm FPL51 and lanthanum air-spaced triplet has a 800 mm focal length and nominal f/7 focal ratio. It is intended for visual astronomy and astrophotography with the appropriate camera train.
Manufacturer model: TS-Optics Photoline 115 ED Triplet OTA · Specifications checked against manufacturer data on 2026-11-04
This 115 mm FPL51 and lanthanum air-spaced triplet has a 800 mm focal length and nominal f/7 focal ratio. It is intended for visual astronomy and astrophotography with the appropriate camera train.
Focusing and mechanical design
The 2.5-inch dual-speed RAP focuser rotates through 360° and provides M63/M68 threaded attachment as well as visual sockets. The tube weighs 5.9 kg.
Imaging configuration
The optional TSFLAT25Del and matched 0.8× TSREDM63-115 are documented at 55 mm from the M48 camera thread.
Additional specifications
Elements
3 elements, air-spaced, fully coated
Glass
Triplet objective with two special glasses (FPL51 / lanthanum glass)
Lens edges
Blackened to prevent reflections
Speed settings
Reduction gear for more precise focusing
Weight of the optical tube
5.9 kg
Connection thread on the tube for the focuser
M113x1 female thread
Transport length with retracted dew shield
710 mm
Astrophotography
Particularly well-suited for astrophotography
Dew shield outer diameter for solar filters
140 mm
Dew shield inner diameter
front 128 mm, rear 135 mm
Dovetail bar
Vixen GP style, length 200 mm - hole spacing 180 mm
51023
Data sheet
Aperture
115 mm
Backfocus
123 mm from 2" receptacle, 160 mm from the connection thread without receptacle
Dew shield
Extendable dew shield with locking mechanism - transport length only 71 cm
Focal length
800 mm
Focuser
2.5" RAP focuser with 360° rotation, M63x1 female thread, M68x1 female thread, 2" and 1.25" connection
Manufacturer listed equipment
Photoline Apo 115/800 mm CNC tube rings Dovetail bar Vixen style Finder shoe Dust caps TS Star Test
Manufacturer part number
Apo115f7
Model
TS-Optics Photoline 115 ED Triplet OTA
Objective
handcrafted, 115 mm f/7 EDT
Tube diameter
115 mm
Tube material
High-quality aluminium tube
Specific References
MPN
Apo115f7
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TS-Optics Photoline 115 ED Triplet OTA This 115 mm FPL51 and lanthanum air-spaced triplet has a 800 mm focal length and nominal f/7 focal ratio. It is intended for visual astronomy and astrophotography with the appropriate camera train.
Manufacturer model: TS-Optics Photoline 115 ED Triplet OTA · Specifications checked against manufacturer data on 2026-11-04
