QHY Adaptersets

Click here for the QHY-PDF of the complete adapter system with all system drawings

QHY offers a very comprehensive and flexible adapter system that allows our cameras to achieve focus with a variety of accessories, including camera lens adapters, off-axis guiders, filter wheels and numerous optical systems. The many potential combinations of these items produce an equally large variety of back-focus distances that must be considered to make it all work together. This variety and flexibility, however, also can be confusing particularly for new users.This is one of the reasons why we at Baader Planetarium keep receiving customer inquiries on the subject of "How do I adapt my QHY camera to my telescope?"

How do I adapt my QHY camera to my telescope?

If you use a refractor, a Schmidt-Cassegrain or a Newtonian telescope WITHOUT any other special optical accessories in the optical path, the answer is simple. Since there are no requirements for a specific back focal length, the camera can be flanged to the focuser via a T2/2 inch adapter (standard T mount - thread size M42x0.75) or M48/2 inch adapter. The camera image is focused via the focuser and imaging can be started. Filter wheels and/or off axis guiders in the optical path - provided there is sufficient focus travel - do not play a role here.

The situation is different when special telescopes such as the Celestron RASA or Hyperstar systems are to be used, or optical accessories are inserted into the optical path in refractors or Newtonian telescopes. Both the fast (f/2.0) Celestron telescopes and special optical accessories require - if they are to provide perfect star images - a precisely maintained back focus value (BFL - Back Focus Length) between the additional optics and the sensor surface. Accessories include Multi Purpose Coma Correctors (MPCC) for Newtonian telescopes and focal reducers or field flatteners for refractors. This also includes lenses for Canon and Nikon DSLR cameras.

If, in addition to the simple camera adaptation, accessories such as a filter wheel and/or off-axis guider are added, the assembly of adapter rings can be quite tricky if a required back focus has to be kept to a few millimeters, and different camera models also have different mechanical distances between the camera body and the sensor surface (back focal distance). However, it is a great advantage that the required back focus distances of optical accessories is 55mm by default; this is the back focal distance of the old SLR cameras (the distance between the lens bayonet of the camera body and the film surface).

QHY Adapter Kits

All details about the QHYCCD Adapter Kits can be found here

We have therefore - together with QHY - put together a series of complete adapter sets (instead of single adapter rings) that cover 99% of all possible combinations with QHY cameras and accessories. All these adapter sets have a M48 female thread on the telescope side or a Canon/Nikon bayonet for connecting DSLR lenses. The direct telescope connection is then made via the Baader M48 adapter system or via the Baader M48/2 inch adapter.

As a user, you only need to know the selected camera model and any accessories, then you can select the required adapter combination from the table and order it from us. We will then directly deliver the calculated results and the corresponding adapters. Please note that the products shown in the graphics of the PDF file, such as cameras, filter wheels, Off Axis Guider modules, etc., are NOT included in the scope of delivery of the Combo, but only the required adapter rings and screws.

The PDF-file lists all kits which we will be offering in 2021.

Please note: After the release of these kits, many single adapters will for the most part (except a few models as shown in Table 3) no longer be available individually.

We offer the following QHY Adapter Kits:

Model	QHYCCD product No.	Baader product No.	Compatible with	achievable Backfocus Length (BFL) and/or adaptable lenses with the kit	included adapter and screws	Note
QHY Adapter Kit A1 for QHY 294M / 163M	020100	1932710	QHY294M / 163M CFW3M-US OAG	55mm BFL e-g. for MPCC	1x 5mm M54 to M48 Adapter 1x 3mm Spacer 1x 0.5mm Spacer 1x 10mm Spacer 8x 22mm M3 screws	This Combo A1 is included as a standard accessory with the QHY294M
QHY Adapter Kit A2 for QHY 294M / 163M	020101	1932711	QHY294M / 163M CFW3S-US	Canon EF Lens	1x 10mm M54 Canon EF Adapter 1x 4mm Screwed Adapter M54 1x 3mm Spacer 1x 1mm Spacer 1x Cam Top Adapter (QHY #020063) 8x 10mm M3 screws
QHY Adapter Kit A3 for QHY 294M / 163M	020102	1932712	QHY294M / 163M CFW3M-S OAG	Nikon F Lens	1x 10mm Nikon F Adapter M54
QHY Adapter Kit B2 for QHY 268M	020104	1932723	QHY268M CFW3L	Canon EF Lens	1x 10mm Canon EF Adapter M54
QHY Adapter Kit B3 for QHY 268M	020105	1932726	QHY268M CFW3L	Nikon F Lens	1x 12mm Nikon F Adapter M54 1x 0.5mm Spacer
QHY Adapter Kit C1 for QHY 600 PH	020106	1932730	QHY600M-PH CFW3L	55mm BFL e-g. for MPCC	5mm M54 to M48 Adapter 7mm Spacer 8x 14mm M3 screws	This Combo C1 is supplied as a standard accessory with QHY600M-PH
QHY Adapter Kit D1 for QHY 268C / 600C / 168C / 247C/ 128C / 410C / 367C	020107	1932740	QHY 268C (version before 2023) / 600C 168C / 247C /128C 410C / 367C	55mm BFL e-g. for MPCC	1x 5mm M54 to M48 Adapter 1x QHY 2.5mm Filter Fixer for 2" Filter #1932780 (QHYCCD prodcut No. 020055) 1x 10mm Spacer 1x 14mm Spacer 8x 36mm M3 screws	This Combo D1 is supplied as a standard accessory with QHY600C and QHY 268C (version before 2023)
QHY Adapter Kit D2 for QHY 268C / 600C / 168C / 247C / 128C / 410 C / 367C	020108	1932741	QHY 268C (version before 2023) / 600C 168C / 247C / 128C 410C / 367C	Canon EF Lens	1x 10mm M54 Canon EF Adapter 1x 4mm M54 Screwed-Adapter 1x QHY 2.5mm Filter Fixer for 2" Filter #1932780 (QHYCCD prodcut No. 020055) 1x 3mm Spacer 1x 1mm Spacer 8x 14mm M3 screws
QHY Adapter Kit D3 for QHY 268C / 600C / 168C / 247C / 128C / 410C / 367C	020109	1932742	QHY 268C / 600C 168C / 247C / 128C 410C / 367C	Nikon F Lens	1x 10mm M54 Nikon F Adapter 1x 4mm M54 Schraub-Adapter 1x QHY 2,5mm Filter-Klemmvorrichtung für 2" Filter #1932780 1x 3mm Zwischenring 1x 0,5mm Zwischenring 8x 16mm Schrauben M3
QHY Adapter Kit E1 for QHY 533C / 294C / 163C / 183C	020109	1932743	QHY533C / 294C Pro / 163C / 183C / Also for 163M / 294M / 183M without filter wheel or OAG usable.	Allow direct connection via M48 threads and provides 55mm of backfocal distance 55mm BFL e-g. for MPCC, Nikon F Lens or Canon EF Lens		The Kit is supplied as a standard accessory with QHY533C
QHY All-In-One Adapter Kit M42 for QHY 183M		1932750	QHY183M CFW3S-SR CFW3S-US OAGS		1x 8mm M42 to M48 Adapter 1x 3mm M42 Screwed-Adapter 1x Cam Top Adapter (QHY #020063) 1x 0.5mm/1mm/2mm/3mm/7mm/10mm Spacer 8x 21mm M3 screws 8x 10mm M3 screws 8x 12mm M3 screws
QHY All-In-One Adapter Kit M54 for all CMOS Kameras		1932760	All CMOS cameras, CFWM-SR CFWM-US CFWL OAGM		1x 5mm M54 to M48 Adapter 1x 3mm M54 ti M42 Adapter 1x QHY 2.5mm Filter Fixer for 2" Filter #1932780 (QHYCCD prodcut No. 020055 1x 4mm M54 Screwed-Adapter (QHY #020070) 1x Cam Top Adapter (QHY #020063) 1x 0.5mm/1mm/2mm/3mm/7mm/10mm/14mm Spacer 8x 8mm M3 screws 8x 10mm M3 screws 8x 12mm M3 screws 8x 14mm M3 screws 8x 16mm M3 screws 8x 21mm M3 screws 8x 24mm M3 screws 8x 28mm M3 screws 8x 36mm M3 screws 8x 50mm M3 screws

The following is an example of the QHY Adapter Kit D1 for a range of QHY cameras, off axis guiders and a back focus of 55 millimeters.

We hope to make the answer "How to adapt my QHY camera to my telescope" much easier for our QHY customers with our Adaper-Kits and the corresponding pdf-file.

Note: For the Celestron RASA telescopes, the adaptation via T2 or M48 is included in the scope of delivery. (RASA 36: M48; RASA 11: M48 and T-2; RASA 8: T-2 and C-Mount)