ASKAR 151PHQ APO QUADRUPLET f/7 Avalon this has an RCA connector

this has an RCA connector that matches the common jack of dew heaters

The design of these filters is optimised to cut out the typical yellow emission of the sodium and mercury lamps around 589nm

66x reduction factor transforms the FC-100DZ into a 530mm f/5

the ASIAIR MINI is able to support hundreds of equatorial mounts from more than 20 manufacturers worldwide

you have to add one of the many optional adapters with T2

ASKAR 151PHQ APO QUADRUPLET f/7 Avalon this has an RCA connectorThe Askar 151PHQ is a professional apochromatic flatfield Petzval quadruplet with a focal ratio of f 7 and a corrected field of 60mm in diameter, making it suitable for use with medium format cameras. The largest of the Askar refractors so far, the 151PHQ includes two Extra Low Dispersion glass elements for superb correction of chromatic aberration. The central RMS radius is less than 2 microns, with sharp stars all the way to the edge of the field.