Flattener and Correctors:

Skywatcher 0.85x focal reducer and field flattener for 100/900mm ED refractor

Item condition: new and original packed

TS Optics M68 System - Conversion adapter with continuous M68x1 male thread This adapter turns a female M68x1 connection to a male M68x1 connection In combination with the TSO-M68i-M68i and the TSO-M68Konter you have a very short variable M68 extension ring. Delivery contents Adapter Specifications: Connecting thread: M68x1 male thread Total length: 12 mm

Item condition: new and original packed

Adaptor for 0,75x Riccardi Reducer to M48 / 2" Filterthread This short adapter is required wherever an M63 internal thread is connected with an adapter or photographic accessories with an M48x0.75 threaded connection. In addition, a 2 "filter can be integrated into the system, a suitable filter thread is available on the telescope side.

Item condition: new, but not original packed

Product description TS Optics 0.8x full-frame corrector for f/8 RC telescopes with M68x1 connection This reducer offers a complete correction of the image field of RC telescopes with reduction of the focal length to 80% at the same time. Pure focal reducers reduce the focal length without correcting the image field. The result is an aberration (astigmatism) in the corners. The larger the sensor, the more pronounced the aberration. The reducer is designed especially for the image field of f/8 RC telescopes, thus it eliminates the aberrations entirely. The results are sharper, pinpoint stars and easier focusing. Adaption to the telescope You have two possibilities of adapting to the RC telescope. You can thread the corrector to the focuser or countersink it into the drawtube if you have less than 135 mm working distance. Adaption via the female M68x1 thread at the telescope side Via suitable adapters, you can attach the corrector to any focusers from 2.5" upwards. You just have to provide the focuser with a male M68x1 thread at the camera side. Please note that you need at least 135 mm working distance from the male thread. Adaption with countersinking the corrector into the drawtube at the same time If there is less backfocus, we recommend countersinking the corrector into the drawtube. Thus the necessary backfocus is reduced to less than 100 mm. There are suitable adapters for example the adapter TSO-M78a-M68a for focusers with the female M78x1 . Adapting the camera The working distance from the male M68x1 thread at the camera side is 82 mm, thus you have enough space for individual adaptions or accessories like off-axis guiders. The male thread is not taken into account for the working distance, as it disappears into the connection adapter. Delivery contents 0.8x reducer and corrector for RC M68 dustcaps, made of metal, for both sides

Item condition: new and original packed

Altair Starwave v3 0.8x Reducer T2 Thread

Item condition: new and original packed

TS-Optics REFRACTOR 0.8x corrector for refractors up to 102 mm aperture - ADJUSTABLE

Item condition: new, but not original packed

ASA-Astrosysteme Newtonian Reducer Corrector 0.-73 x , 2KORRR-1105 ( New cost by ASA was Euro 791)

Item condition: new and original packed

The Skywatcher 0.85x focal reducer / field flattener has been designed for astronomers who want to use the renown ED Apo for astro photography. The flattener reduces the telescope's focal length by the factor of 0.85 and increases the useful field. As a positive side effect, the necessary integration times are significantly reduced. The field curvature that is unavoidable at most telescope systems is reduced to a nearly irrelevant level when using sensors up to APS-C format (24x16mm). Optimal distance M48 - focal plane: 55mm

Item condition: new and original packed

Skywatcher - 0.85x Focal Reducer/corrector for Evostar-80ED DS-PRO

Item condition: used, but with visible cosmetic markings

Product description Skywatcher Esprit 100ED Field Flattener with M48 Thread The original Skywatcher Esprit Field Flattener for the Esprit 100ED. The Flattener corrects the field of view and illuminates it up to full format cameras. Delivery contents Flattener

Item condition: new and original packed

0.77X REDUCER/FLATTENER FOR ESPRIT-150ED TRIPLET Designed specifically for the Sky-Watcher Esprit-150 ED Apo Refractor, the new three-lens Focal Reducer/Flattener has a reduction factor of 0.77x. It comes with a standard adaptor with M48 thread edge and 55mm back focus for use with Sky-Watcher's M48 Canon EOS (code 20237) and Nikon (code 20238) adaptor rings. After removing the adaptor, an M71x1 internal thread with maximum 75mm back focus is available for self-made adaptor solutions. The Reducer/Flattener produces a fully illuminated and corrected image circle of 34mm diameter and is therefore perfectly suitable for image formats up to APS-C but can also be used for full format. Scope of Delivery: Esprit 150ED Focal Reducer / Flattener 2 screwable dust covers Adapter to M48 thread Specifications: Coating: multi coating Reduction:: 0,77x Connection to camera: M48 thread

Item condition: new and original packed

Product description TS Optics PHOTOLINE 2" 1.0x Flattener for Refractors and Apos With the TSFLAT2, a professional field corrector for apochromats, EDs and normal Fraunhofer achromats is available to the astrophotographer. The corrector is suitable for refractors from f/4 to f/9. Advantages over other 2" correctors Clear aperture of 45 mm without vignetting, even full-frame size sensors can be used. Generous working distance between 108 mm and 128 mm, depending on the focal length of the telescope. M48x0.75 - 2" filter thread at the telescope side for filters and at the camera side for further adaptions. Also visually usable, the sharpness in the field is significantly improved. Easy adaption vie 2" barrel - with the adapter package TSO-TSFLAT2A you get a complete adaptation from the flattener to the camera from Teleskop-Service. Suitable for all 2" focusers, the corrector is completely sunken into the focuser Inner blackening and anti-reflex thread Recommended distances from the M48x0.75 thread to the corrector In principle this rule applies: the shorter the refractor´s focal length, the longer the working distance to the sensor has to be. focal length < 450 mm: 128 mm focal length 450-490 mm: 123 mm focal length 500-550 mm: 118 mm focal length 560-590 mm: 116 mm focal length 600-690 mm: 113 mm focal length 700-800 mm: 111 mm focal length ab 800 mm: 108 mm An underrun or an overrun of the distance of up to 5% has no visible effect on the sharpness in the field of sensors with formats up to APS-C. With larger sensors, the tolerance is reduced to 1-2%. Delivery contents Flattener Dust caps

Item condition: new and original packed