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gptkb:Maksutov-Cassegrain_Telescope
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spherical primary mirror
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gptkb:Schneider-Kreuznach_Xenar_38mm_f/2.8
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Tessar-type
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gptkb:Classic_Heliar
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gptkb:Heliar
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gptkb:Zeiss_Sonnar_85mm_f/2.0
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gptkb:Sonnar
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gptkb:Newtonian_telescope
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reflector
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gptkb:Meade_LX90_8-inch
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gptkb:Schmidt-Cassegrain
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gptkb:Maksutov_camera
|
spherical mirror
|
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gptkb:Distagon_lens
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retrofocus
|
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gptkb:ETX_telescope_series
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refractor (some models)
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gptkb:Duomar_Lens
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twin lens
|
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gptkb:Nikon_Monarch_binoculars
|
gptkb:Roof_prism
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gptkb:50-cm_Zeiss_Cassegrain
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gptkb:Cassegrain
|
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gptkb:Meade_LX200_14-inch
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gptkb:Schmidt-Cassegrain
|
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gptkb:Celestron_CPC_Deluxe
|
catadioptric
|
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gptkb:Grubb_12-inch_refractor
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achromatic doublet
|
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gptkb:Jupiter-3
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Sonnar-type
|
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gptkb:Heliar_lenses
|
symmetrical
|
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gptkb:Maksutov_camera
|
meniscus corrector lens
|
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gptkb:Newtonian_reflector
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gptkb:astronomer
|
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gptkb:Steinheil_Cassar_lens
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3 elements in 3 groups
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