TS Optics Photoline Apo reducer 0.75x for apochromatic and ED refractors
The 3-element 0.75x reducer and flattener is designed for apochromatic refractor telescopes. The corrector is suitable for almost all refractors with focusers of at least 2.5" diameter. The focal length is reduced to 75% and the speed is increased correspondingly. At the same time the image field is corrected. Now cameras with sensors up to full-frame size can be used. Turn your refractor into a fast astrograph with the Photoline 0.75x reducer.
Working distance from corrector to camera
The problem with tilting is solved by a new design.
The corrector can be used with all refractors with focusers from 2.5" upwards. The required backfocus is about 130 mm from the connection thread. Every refractor which is designed for 2" can work with this reducer, too.
The working distance from the M48x0.75 thread is 55 mm, perfect for astro cameras and (D)SLR cameras.
For maximum flexibility, the corrector provides three connection threads at the camera side, M68x1 thread (male), M54x0.75 thread (female) and M48x0.75 thread (male).
The corrector fits to all focusers with the male M74x1 thread and with the female M68x1 thread. Conversion adapters, for example to M63x1, are available.
Due to the new design, the corrector tolerates deviations to the recommended working distance of up to +/- 1 mm. Nevertheless you should stick to the distances as exact as possible.
From 700 mm focal length, the following working distances are valid:
From the male M48x0.75 thread: 55 mm
From the female M54x0.75 thread: 65.5 mm
From the male M68x1 thread: 60 mm
For apos with a focal length from 600 mm to 700 mm, the working distance is extended by 1 mm.
For apos with a focal length from 550 mm to 590 mm, the working distance is extended by 3 mm.
For apos with a focal length from 480 mm to 540 mm, the working distance is extended by 5 mm.
TS Photoline 0.75 Reducer
Adapter from M54x0.75 to M48x0.75
Adapter from M74x1 to M68x1
Metal dust caps for both sides
The corrector is suitable for APO and ED refractors of 480 mm focal length or more