Home :: OPTICAL ACCESSORIES :: Barlows, Reducers & Correctors :: Reducers & Flatteners :: APM Riccardi 1x Field Flattener Model 1 for f/6-f/7 APO Refractors

APM Riccardi 1x Field Flattener Model 1 for f/6-f/7 APO Refractors

Manufacturers View products from this brand

in In stock (2)
1.50 kg
Our price:
including VAT 20.00 % ( £74.83 )

APM Riccardi 1x Field Flattener Model 1 for f/6-f/7 APO Refractors

The APM Model 1 field flattener is intended specifically for refractors with focal ratios from F6 to F7. A sister design, the Model 2, is for F7 to F8 refractors. The flattener has been designed by Massimo Riccardi for APM Telescopes to provide a 60mm flat field. It currently represents the limit of what is possible. There is no comparable flattener with such a good apochromatic longitudinal and lateral aberration correction on the market. Other cheaper models fall short significantly , which is already obvious by their significantly higher vignetting but mainly by the drastically higher inferior lateral chromatic aberration they typically exhibit.

These flatteners represent the perfect match for all our refracting telescopes for those seeking the best possible performance from a non-magnifying flattener. For those seeking similar performance from a reducer, then we offer the APM Riccardi 0.75x Reducer, that provides 50mm illuminated field.


Camera Side Thread M68 Female
Telescope Side Thread M82 Male
Coating Multicoated
Housing Aluminium
Magnification 1.0x
Lenses Triplet, Apochromatic
Back Focus >90mm (Telescope Dependent)
Illuminated Field 60mm
Length 70mm
Weight 450g


: *
: *
: *
Spare Large Base for Celestron StarSense Accessory
Celestron Lithium Phosphate Power Tank 7Ah 12v Power Supply
Baader M68 Spacer - Extension Ring 0.5mm Thick (red)
Baader M68 Extension tube 7.5mm
There have been no reviews

Only those who bought this product are allowed to add review
If you've already bought this product, please sign in and add your own review!
The website uses cookies to allow us to better understand how the site is used. By continuing to use this site, you consent to this policy. Click to learn more.