Riccardi Reducer M82
Riccardi Reducer M82


Riccardi Reducer M82

Regular price
$ 595.00
Sale price
$ 595.00
Unit price

This item is out of stock but you can place an order now and we’ll ship when it becomes available.

APM-Riccardi Apo-Reducer / Flattener 0,75 x M82 large

Our new reducer, calculated and designed from Riccardi

Massimo Riccardi, famous optical designer from Italy, designed for APM-Telescopes a new 3 element 0.75 x Apo-Reducer/Flattener Corrector 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/flattener 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 larger than 90 mm.

You can find the correct backfocus for your telescope in the enclosed PDF chart (see below). The total optical path of reducer plus backfocus plus focus change is between about 185 mm and 210 mm.

The illumination and correction are made for chips up to full format.

You can find the correct adapter for your telescope camera combination in the enclosed PDF graphic (RiccardiAdaption.pdf).

Delivery contents
  • Reducer
  • 2 Dustcaps

Connection to camera:
M82 x 1 ID-Thread
Connection to telescope:
M82 x 1 OD-Thread
Fully multicoated
Housing material:
Recommended distance from focal plane to connectingthread:
watch PDF
Focal length reduction:
0.75 x
3 Lenses
Optical length without collimation flange:
196.70 mm
Optical length with collimation flange:
207.70 mm
Fully corrected field:
52 mm
83.7 mm
90 mm
35.1 oz (with Dustcaps 38.6 oz)

More information, user manuals, data sheets etc.

Apo 105_650+075x reducer.pdf
Apo 107_700+075x reducer.pdf
Apo 115_800+075x reducer.pdf
Apo 130_1200+075x reducer.pdf
Apo 130_780+075x reducer.pdf
Apo 152_1200+075x reducer.pdf
Apo 175_1400+075x reducer.pdf
Apo 180_1260+075x reducer.pdf
Apo 203_1420+075x reducer.pdf
Apo 203_1800+075x reducer.pdf
Apo 228_2050+075x reducer.pdf
Apo 254_2250+075x reducer.pdf
ApoDoublet 152_1200+075x reducer.pdf
Big reducer+Apodoublet chinese.jpeg
Big reducer+Apodoublet Lzos.jpeg
Apo 100_800+075x reducer.pdf

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