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Adapters for small sized cams
2019 / 11 / 22

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SCENARIO I :SMALL SIZED CAMERA + TELESCOPE W/O CORRECTORS
This is the most basic solution and use the camera as is or as an EAA sensor. In this case the camera was used as an eyepiece of either 1.25” or 2”. Most telescope has a tolerant range of back focus distance; a simple connection is sufficient.
 

Model Back focus consumed Where to acquire Whether tailored screws are needed
020010
M42 to 1.25”
 
or
 
020011
M42 to 2”
27mm(2mm) Incl. in all small camera 183/178/224/290/174 package NO
32.5mm(2.5mm) Incl. in small sized MFT frame or bigger size sensor camera
163/294/550 package
 

 
SCENARIO II :SMALL SIZED CAMERA + CAMERA LENS/TELESCOPE WITH FLATTENER
As aforementioned, the back focus of DSLR lens is fixed. Therefore, the optimal back focus distance (OBFD) in such setup must be met strictly. This is applicable to telescope flattener, which can be considered as a lens. The only difference is the mounting method, bayonet mount for camera lens and regular threaded mount for flattener.

To reach the OBFD in such system, the fine adjustment adapters can be used: the 20090 (small size)/020089 (medium sized) are comprised of 5 different pieces of adapter of 0.5/1/2/3/7mm respectively. They can be combined into various thickness to meet specific demands. Tailored screw may require for the adapter(s).

While using the fine adjustment adapters in small sized camera, the external adapter (020085) needs to be replaced by threaded external adapters (020056 and 020083). The 020083 is included in the standard package of small off axis guider (OAGS)


Model Back focus consumed Where to acquire Whether tailored screws are needed
020056 3mm Purchased separately Likely
020083 3mm Purchased separately
020090 External adapter 4mm;
Fine adjustment adapters13.5mm
(0.5+1+2+3+7)
Purchased separately
020072/
020074
10mm Purchased separately(72 for CANON EF MOUNT,74 FOR NIKON F MOUNT)
 


 
SCENARIO III : SMALL SIZED CAMERA + COLOR FILTER WHEEL
The small sized camera can be fitted with either smaller sized or medium sized color filter wheel (CFW). Please choose one that is suitable for your system. CFW 2 and CFW 3 share the same connection method, in the following demo, only CFW3 is shown.

The CFW can be threaded directly onto the camera without any extra adapters as shown per follow. Attention: the CFW adapter does not add back focus length because the design is to let the top of cam (020085) plug into CFW, the total length is 8mm still.
 


Alternatively, adapter 020063 can replace the original adapter in the original imaging chain. There are 2 major advantage of such replacement. Firstly, it consumed less back focus. Secondly screws are used in fixing the CFW in place, by which may reduce tiltness in the imaging chain. Such method requires minor works by opening the CFW and removing the original adapter. Detail illustration can be found in the appendix.



Model Back focus consumed Where to acquire Whether tailored screws are needed
020063 1mm Purchased separately No
 


One side of the filter wheel has matching threads for the camera respectively (M42 for small CFW, M54 for medium CFW).


SCENARIO IV: SMALL SIZED CAMERA + OAG 
The following illustration is the recommended connection method for small sized camera + OAGS



Model Back focus consumption Where to acquire Whether tailored screws are needed
020082
020083
3mm
3mm
Incl in OAGS package No (screws are incl. in the OAG package)
020056 3mm Purchased separately


We highly recommend matching size for OAG and camera. However, users may want to fully utilize idled equipment.  The following illustration is the recommended connection method for small sized camera + OAGM.


Model Back focus consumption Where to acquire Whether tailored screws are needed
020081
020080
3mm
3mm
Incl in OAGM package No (screws are incl. in the OAG package)
020056 3mm Purchased separately
 
 

Please refer to scenario I and II to add the OAG into the imaging chain for either telescope or camera lens. Also, please ensure the 020082/020080 adapter install at the outer side of the OAG. They have the matching thread size of the camera (M42 and M54 respectively).

 
SCENARIO V: SMALL SIZED CAMERA + CFW + OAG
OAGS connected with screws and external adapter is used (DO NOT INSTALL THE INTERNAL ADAPTER 020083).

ATTENTION: this combo CANNOT match DSLR Lens, because the length is too long for Canon/Nikon back focus. Without OAG will be okay.

Small sized cams can connect CFWS+OAGS or CFWM+OAGM. The adapter used is a little different.


SMALL SIZED CAMERA + CFW S+ OAG



SMALL SIZED CAMERA + CFW M+ OAG





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