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Opticron provides a comprehensive range of zoom eyepieces for the MM3 and MM4 Travelscopes which offer great functionality whilst out in the field in a single, compact eyepiece. The choice of eyepiece is important to ensure maximum image quality and depends on budget and the application for which you wish to use it.
HR3 Zoom Eyepiece (Model 41145)
The Opticron HR eyepieces are a fantastic entry-level choice for the value-conscious user and are perfect for general field surveying or birdwatching. This zoom lens will magnify from 13-39x when used with the MM3/MM4 50 or 16-48x when used with the MM3/MM4 60. Long eye relief is ideal for wearers of spectacles. The HR3 zoom eyepiece has a twist type eyecup and comes with an Opticron five-year guarantee.
HDF T Zoom Eyepiece (Model 40862)
The Opticron HDF eyepieces are the preferred choice for image quality, offering large diameter eye lenses and a 'walk-in' field of vision. This eyepiece has long eye relief to enable the full field of view to be obtained, with or without spectacles. The zoom lens will magnify from 12-36x when used with the MM3/MM4 50 or 15-45x when used with the MM3/MM4 60. It has a twist type eyecup. Covered by Opticron's ten-year guarantee.
SDL v3 Zoom Eyepiece (Model 41270)
Provides the widest field of view of any SDL eyepiece in a smaller lighter package. Designed with a 3x range for maximum versatility, the eyepiece delivers superior cross-field definition and exceptional viewing comfort with or without glasses. This zoom lens will magnify from 12-36x when used with the MM3/MM4 50 or 15-45x when used with the MM3/MM4 60. Covered by Opticron's ten-year guarantee.
HR3 Zoom Eyepiece
* Model number: 41145
* Magnification: 13-39x (MM3/MM4 50); 16-48x (MM3/MM4 60)
* Eye relief: 16-20mm
* Eyecup type: 4-stage twist
* Focal length: N/A
* Eye lens diameter: 24mm
* Dimensions (LxWxD): 78 x 52 x 52mm
* Weight: 260g
HDF T Zoom Eyepiece
* Model number: 40862
* Magnification: 12-36x (MM3/MM4 50); 15-45x (MM3/MM4 60)
* Eye relief: 17-22mm
* Eyecup type: 2-stage twist
* Focal length: N/A
* Eye lens diameter: 24mm
* Dimensions (LxWxD): 76 x 50 x 50mm
* Weight: 206g
SDL v3 Zoom Eyepiece
* Model number: 41270
* Magnification: 12-36x (MM3/MM4 50); 15-45x (MM3/MM4 60)
* Eye relief: 18-20mm
* Eyecup type: 4-stage twist
* Focal length: 8-24mm
* Eye lens diameter: 25mm
* Dimensions (LxWxD): 68 x 52 x 52mm
* Weight: 260g