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Series IV  Components

35mm 'Stiletto' Bayonet Modular Mounts Bayonets for every camera brand! 

Additional 35mm bayonet modular mounts are available for all manual, AF, and digital Nikon, Olympus, Minolta, Pentax, Canon, Yashica and other cameras.   All mounts fit the Series IV body module and are interchangeable.  If you have different cameras, you can easily change from one mount to another instantly.  All mounts can attach to the Series IV body or may be used standalone for focusing.  Each comes with our black chromium 300 line/inch ronchi screen. Modular mounts for Medium Format cameras are also available separately and are listed in our pricing section. 

Mounts for every CCD brand! Additional CCD Modular 'Stiletto' Mounts

Separate modular mounts are available for all S.B.I.G, Meade, Starlight  Xpress, Apogee, Genesis,  Finger Lakes, and SAC CCD camera systems.  Each mount is calibrated for your particular model of camera and comes with our black chromium 300 line/inch ronchi grating.  If you have more than one camera system, additional modular mounts allow you to change from one to the other on the fly.  All mounts employ an M42 1mm standard thread to attach to the Series IV body or may be used in standalone fashion.

Series IV 'Stiletto' True-Knife Assembly

Knife-edge focusing the easy way The True-Knife Assembly, available as an option with the Series IV, lets the user experience true knife-edge focusing the easy way. While designed with the perfectionist in mind, using it  with the Series IV allows even novices to easily get a handle on this approach.   The True-Knife Assembly replaces the standard ronchi screen in the 'Stiletto' housing.  No recalibration is necessary.  Snap the regular screen out, and then snap  the True-Knife in.  It's that easy.  With the Series IV,  the knife-edge pattern is magnified, plus the swivel-mounted diagonal affords added comfort in viewing at any angle. Click here for a short tutorial on knife edge focusing with the True-Knife option.                                   

     Additional 'Stiletto' Ronchi Screens

  Resolutions for special applications                                          The standard model Series IV comes with a 180 line/inch ronchi grating installed.  There may be occasions, however,  when higher or lower resolution screens may be desirable.  This depends largely on the darkness of your sky and the objects you are focusing on.  In general, darker skies permit you to use a  higher resolution screen which, in turn, results in more precise focusing.  In practical terms, you should know that as the number of lines/inch on the screen increases, the brightness of the bars viewed accordingly decreases.  You may also find it worthwhile to use a higher resolution grating when using your equipment with a field reducer or coma corrector to compensate for changes in depth of field.  Additional ronchi screens are available in resolutions of 100,180,200, and 300 lines/inch.  Each is interchangeable and requires no recalibration.  Click here to see how easy it is to change screen resolutions.

                                                               Storage and Carrying Case

     An Carrying Case to store the Series IV and components is available separately.  This rugged case measures 12"x 8"x4" and comes with die-cut foam to well protect the focuser during travel and storage.