Coma Corrector:

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2" Parallizer Adapter für APM 2 Zoll komakorrigierende 1,5x telezentrische Barlow

Item condition: new and original packed

83.19 €
Delivery date : 1-2 days
Glas FK61 (similar to Ohara FPL51), has blackenededges, a measured transmission von over 99% from 400 nm to 700 nm, optimized for F/4 Newtonian-Telescopes. The barlow has a negative focal length of - 62.9 mm and a working backfocuse of 105 mm from center last lens to focuse ( eyepiece field stop). You will need now a 1.25" eyepiece holer 104 mm long

Item condition: new and original packed

105.04 €
Delivery date : 1-2 days
Adapter für 2.7x Barlow

Item condition: new and original packed

58.82 €
Delivery date : 1-2 days
APM-G.Düring designed comacorrecting 1.25" Barlowlens 2.7 x with dual photo-visual Adapterset

Item condition: new and original packed

158.82 €
Delivery date : 1-2 days
APM 2 inch coma-correcting telecentric 1.5x Barlow

Item condition: new, but not original packed

415.97 €
Delivery date : on request
APM Comacorrecting 1 1/4" ED Double Barlow 6.25 x

Item condition: new, but not original packed

247.90 €
Delivery date : 1-2 days
Product description The GPU Aplanatic Newtonian Coma Corrector for Astrophotography The coma corrector has been designed by Pal Gyulai - GPU Optics - for Newtonian telescopes with a focal ratio of f/4. The result is a high-quality 4-element corrector which offers round stars over the entire image field even with larger camera sensors. In opposite to 2-element correctors, the stars are not enlarged. Furthermore, the whole construction is designed to be free from reflexes. Even bright stars will be shown without reflexes or ghostings. The Advantages Very good coma correction for Newtonian telescopes from f/3.5 to f/6. No change of the focal length, the focus position also remains the same. The corrector can be clamped, but also screwed to the focuser by an optional adapter. The GPU corrector offers correction up to full-frame sensors. For perfect illumination, a FLAT is necessary. Optimal working distance The optimal distance depends on the focal length of the Newtonian telescope. With suitable adapters, you can always obtain the ideal distance. Focal length up to 600 mm: working distance 51.50 mm Focal length 610-800 mm: working distance 53.50 mm Focal length 810-1000 mm: working distance 55 mm Focal length 1010 mm: working distance 54.50 mm Screwing to the focuser With the optional adapter TSO-TSGPU-M68, you can thread the GPU directly into the focuser. The connecting thread is the Zeiss level M68 thread which can be used with many focusers like Moonlite 2,5" or, via adapter, with the Starlight Feather Touch. By the threaded connection, you gain stability and also accuracy. The image is improved and heavy cameras can be used, too. Delivery contents GPU coma corrector Dust caps

Item condition: new and original packed

276.47 €
Delivery date : 2-3 days
Product description TS-Optics Full frame size corrector for Ritchey-Chrétien Astrographs The corrector was developed for all RC telescopes with f/8 which have a 2.5"+ focuser. It corrects the field without altering the focal length. The large clear aperture of 60 mm allows full illumination of full-frame size sensors with suitable adaption. Adaption to the focuser via the M68x1 thread The corrector has a male M68x1 thread at the telescope side. There are adaptions for many established focusers. For the adaption to the female M69x1 thread of the MONORAIL focusers of TS-Optics, AstroTec and GSO RC telescopes you need: M69a-M68a: adapter to the male M68x1 thread M68i-M68i: conversion adapter from male to female M68x1 thread Connection of the camera via the female M69x1 thread The corrector provides a generous working distance of 89.5 mm from the female M69x1 thread at the camera side. Connecting DSLR cameras For connecting DSLR and astro cameras via the M48x0.75 thread, the adapter TSO-M69A-M48A is used. You have exactly 55 mm from the M48 thread to the sensor position. That would be exactly a T-ring and a DSLR camera. Connecting the Zeiss style M68x1 adapters system Many astrophotographers like to work with this professional adapter system. The adapter TSO-M69a-M68a provides an M68x1 connection to the corrector. The working distance from the M68 thread to the sensor is 84.2 mm, so you have enough space for your adaption. Connection of the M48x0.75 adapter system Alongside the T2 system, the M48 adapter system is also very popular. Almost any off-axis guider and many filter wheels have the M48 connection at the telescope side or, at least, can be adapted to this thread. With the adapter TSO-M69-M48, you get a very short transition to M48 with only 1 mm length. Extension tubes for the female M69x1 thread For maintaining the optimal illumination, one should adapt to smaller threads as late as possible. For this purpose, 30 mm and 10 mm extension are offered. These are screwed directly into the camera side thread and reduce the remaining working distance correspondingly. Delivery contents Corrector

Item condition: new and original packed

259.66 €
Delivery date : 2-3 days