Off-Axis Guider - User`s manual
Contents
1. a ase ATIK 8808 CAMERAS Off Axis Guider User s manual Thank you for purchasing the Atik Off Axis Guider OAG With it you will be able to autoguide using a secondary camera and since the autoguider was designed to be attached to our EFW2 it will act as a single rigid unit This is of enormous importance in eliminat ing differential flexure something that is the nightmare of any astrophotographer Getting to know your OAG The OAG was designed to be attached directly to the EFW2 but with the correct adapters it may be possible to attach it to T threaded accessories The OAG system is as follows 1 Focusing ring 2 T thread extensions 3 Locking 5 2 to M54 adapter 6 Main body 7 4mm 7mm and screw 4 Pickup prism 15mm T thread extensions Attaching your OAG to the EFW2 Attaching the OAG to the EFW2 is a very simple task Just follow these instructions 1 Unscrew the 3 grub screws that cover the holes on 2 Align the OAG with the 3 holes and attach it to the the EFW2 front cover EFW2 using the 3 supplied screws 3 Verify that the 3 screws are in place The OAG should 4 If you need to take it off just undo the screws Note now be securely attached to the EFW2 that to change filters there s no need to take the OAG off Using your OAG The OAG is very easy to use and adjust Looking at all components individually The main body 6 is where all the action happens The pickup prism bends t2. he light path through 90 to the guide camera You can attach the OAG to the telescope using the 2 adapter 5 Also a kit of extension rings 7 is supplied so that different guide cameras can be used with different main cameras in several different combinations The choice of extension to use is governed by the main camera guide camera pickup prism position and even the telescope You will need to do some experimentation to find the right combination of rings Both the OAG and the rings have T threads so they will fit any camera with T threads To adjust the pickup prism you need to slightly undo the locking screw the access hole is just below the locking screw making sure that you undo it only slightly There s a captive recess that will prevent the prism support to falling but this will not work if the screw in undone too much causing the support to fall out of place Use your finger to move the prism support to the desired position and then tighten the locking screw Again the correct position will depend on the main camera and telescope used As an example an Atik 11000 will probably need the prism all the way in to avoid shadows and if an SCT is used you ll probably want to lower the prism as much as possible to get better star shapes Focusing your OAG One of the great features of the Atik OAG is the extremely smooth focus mechanism Simply adjust the focusing ring counter clockwise and the camera support wil
3. l smoothly and precisely go up turn clockwise and it will go down It s as easy as that When focused just tighten the locking ring slightly don t over tighten so that the assembly keeps rock solid There s a total travel of about 5mm which in addition to the supplied rings will be enough to make it easy to focus your guide camera
Download Pdf Manuals
Related Search