Call Us: 877.623.4021 | Free US Shipping On Orders $25+ (all Astrodon products and some oversize JMI products excluded)

APM M82 Riccardi APO Reducer – Large

APM M82 Riccardi APO Reducer – Large

$756.00

Out of stock

APM M82 Riccardi APO Reducer – Large for APO telescopes shortens the focal length by a quarter and corrects the image circle – thereby converting telescopes into fast astrographs!

Out of stock

Description

APM M82 Riccardi APO Reducer – Large

APM M82 Riccardi APO Reducer – Large for APO telescopes was calculated from master optical designer Massimo Riccardi.  This 3 element 0.75 x Apo-Reducer/Flattener Corrector is suitable for all TMB-APM-LZOS Apochromatic Telescopes. Tests show that it also works on Apos from other manufacturers as well. The reducer shortens the focal length by a quarter and corrects the image circle – thereby converting your telescope into a fast astrograph!

The connection to your telescope and camera occurs over an M82 x 1 thread. For the correct adjustment of the reducer/flatener we can offer you an adjustment flange.

Usually the reducer is screwed onto the focuser. The reducer can also be installed inside the focuser barrel, if the free aperture is equal to or larger than 90mm.  Please reference the Backfocus Data Chart to locate the correct backfocus for a particular telescope model.  The total optical path of reducer plus backfocus plus focus change is between about 185mm and 210mm.

Illumination and correction are made for chips up to full format..  Please reference Riccardi Adapter Data to locate the correct adapter for a particular camera/telescope combination.

Reviews

There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Package Includes:

  • Reducer
  • Two Dust Caps

Product Specifications:

Connection to camera: M82 x 1 ID-Thread
Connection to telescope: M82 x 1 OD-Thread
Coating: Fully multi-coated
Housing material: Aluminium
Recommended distance from focal plane to connecting thread: See PDF
Focal length reduction: 0.75 x
Lenses: 3 Lenses
Optical length without collimation flange: 196.70mm
Optical length with collimation flange: 207.70mm
Fully corrected field: 52mm
Length: 83.7mm
Diameter: 90mm
Weight: 35.1 oz (with Dustcaps 38.6 oz)

APO Telescope Spot Diagrams

APO Doublet Spot Diagram

APO Doublet Spot Diagram

APO LZOS Spot Diagram

APO LZOS Spot Diagram

Riccardi Backfocus Data

Riccardi Adapter Data

Astrodon products ship worldwide, but this website does not automatically ship other products to all locations. Email weborders@opticalstructures.com for a shipping quote for orders outside the USA and Canada. Items in stock usually ship within one week, but some products take longer and are noted on the product page. Dismiss