Modular Viewing Heads for the BH2
The BH2 line of scopes can be used with various viewing heads, as detailed below. A spreadsheet showing the specifications of the various viewing heads is available here:
BH2-BI30 - Binocular Head, 30-Degree Inclination
The BH2-BI30 is a Jentzsch style binocular head, with automatic correction of optical tube length for all settings of inter-ocular distance. This version, which accepts 23mm oculars and has a 30-degree inclination angle, was standard on the various BH-2 upright scopes. This viewing head may be used on the IMT-2 inverted scope or any of the BH-2 upright scopes.
BH2-BI45 - Binocular Head, 45-Degree Inclination
The BH2-BI45 is a Jentzsch style binocular head, with automatic correction of optical tube length for all settings of inter-ocular distance. This version, which accepts 23mm oculars and has a 45-degree inclination angle, was standard on the IMT-2 inverted scope. This viewing head may be used on the IMT-2 inverted scope or any of the BH-2 upright scopes.
BH2-SWBI30 - Binocular Head, Super-Wide
The BH2-SWBI30 is a Jentzsch style binocular head, with automatic correction of optical tube length for all settings of inter-ocular distance. This version, which accepts 30mm oculars and has a 30-degree inclination angle, provides a super-wide visual field when used with the appropriate (SPlan) objective lenses. This viewing head may be used on the IMT-2 inverted scope or any of the BH-2 upright scopes.
BH2-TR30 - Trinocular Head, Standard
The BH2-TR30 is a trinocular viewing head, with the same 23mm, 30-degree Jentzsch style binocular mechanism used in the BH2-BI30 binocular head. The BH2-TR30 includes a 3-position diverter shaft on the right–hand side, to control the split of light between the binocular eyepieces and the camera port (the light can be split between the eyepieces and the camera port in a 100/0, 80/20, or 0/100 relationship). This viewing head may be used on the IMT-2 inverted scope or any of the BH-2 upright scopes.
BH2-SWTR30 - Trinocular Head, Super-Wide
The BH2-SWTR30 is a trinocular viewing head, with the same 30mm, 30-degree Jentzsch style binocular mechanism used in the BH2-SWBI30 binocular head. The BH2-SWTR30 includes a 3-position diverter shaft on the right-hand side, to control the split of light between the binocular eyepieces and the camera port (the light can be split between the eyepieces and the camera port in a 100/0, 80/20, or 0/100 relationship). This viewing head may be used on the IMT-2 inverted scope or any of the BH-2 upright scopes.
BH2-TBI - Ergonomic / Tilting Binocular Head
The BH2-TBI binocular viewing head uses a 23mm Jentzsch style binocular mechanism similar to that used in the BH2-BI30. This head has an adjustable inclination angle and, unlike the other viewing heads in the BH-2 line, provides an erect (non-mirroring) image. This viewing head may be used on the IMT-2 inverted scope or any of the BH-2 upright scopes.
BH2-TTR - Ergonomic / Tilting Trinocular Head
The BH2-TTR trinocular viewing head uses a 23mm Jentzsch style binocular mechanism similar to that used in the BH2-BI30. This head has an adjustable inclination angle and, unlike the other viewing heads in the BH-2 line, provides an erect (non-mirroring) image. The BH2-TTR includes a 3-position diverter shaft on the right-hand side, to control the split of light between the binocular eyepieces and the camera port (the light can be split between the eyepieces and the camera port in a 100/0, 80/20, or 0/100 relationship). This viewing head may be used on the IMT-2 inverted scope or any of the BH-2 upright scopes.
BH2-SMT Erect Binocular Head
The BH2-SMT uses a Jentzsch style binocular viewing head similar to that used in the BH20BI30. The BH2-SMT provides optically erected imaging.
BH2-PT - Monocular Photo Tube
The BH2-PT monocular phototube can be used on the IMT-2 or any scopes in the BH-2 line, to replace the viewing head and to attach either an eyepiece or a camera (using suitable adapters). The top of the BH2-PT features a 23mm ocular tube, compatible with the various BH-2 eyepieces. The BH2-PT contains no optics whatsoever.
IMT-2 - Photo Tube
The IMT2-PT monocular phototube can be used on the IMT-2 or any scopes in the BH-2 line, to replace the viewing head and to attach a camera (using a suitable adapter). The top of the IMT2-PT features the same NFK photo-projective camera port as found on the BH-2 trinocular heads. The IMT2-PT contains no optics whatsoever.