TS-Optics 5-Element Flatfield Photo Apo Refractor - ED61PHD

TS-Optics 5-Element Flatfield Photo Apo Refractor Telescope 

• The 5-element apochromat with 61 mm aperture and 274 mm focal length has been developed by Teleskop-Service for astrophotography. / 5-element system with doublet FPL53 lens and 3-element corrector
• Aperture: 61 mm / Focal length: 274 mm / High focal ratio f/4.5 for short exposure times
• Illuminated and corrected image field of 44 mm diameter - usable up to full-frame size format
• 2.5" RAP dual-speed focuser with 360° rotation holds even heavy cameras / CNC tube ring with universal dovetail bar with photo tripod connection and carrying handle is included in the scope of delivery / Viewfinder shoe for viewfinders and mini telescopes is integrated at the CNC ring.
• Simple camera adaption via the M48 connection thread - working distance 55 mm

5-Element FPL53 Flatfield-Apochromat
The TS-Optics 61EDPH is designed for astrophotographers and nature photographers. It convinces with its compact dimensions and its high-quality 2-element FPL53 lens (glass from Ohara - Japan). The 3-element corrector has been specially developed for this apo and produces a corrected image field with 44 mm diameter and without chromatic aberration, ideal for full-frame cameras. The fast aperture ratio of f/4.5 allows short exposure times. The 61EDPH is a fast and portable travel apo for astrophotography.

Connecting cameras
An M48x0.75 thread is available on the back of the sturdy 2.5" focuser. The working distance from this thread to the camera sensor is exactly 55 mm. This is ideal for all astro cameras and DSLR / SLR cameras. Matching T-rings can be found in the accessories section.
Observation with the 61SDQ
Although the apochromat was developed for astrophotography, it also allows observation. You have two choices. Unscrew the photo corrector. You have an M63x1 female thread available. With an optional 2" adapter, like M63-2 (see accessories), you can adapt a zenith mirror or an Amici prism and make beautiful nature, landscape and astro observations. You can use both 2" and 1.25" accessories.

Details:

• Connection at camera side: M48x0,75 external thread (male)
• Working distance: 55 mm from the M48 thread
• Auxiliary thread: M63x1 internal thread on focuser - max. 115 mm back focus
• Length: approx 264 mm with dew cap inserted
• Height: approx 141 mm including dovetail and carrying handle