ASKAR FMA135 30mm aperture apochromatic telescope/camera lens features three-element objective lens with ED element for superb color correction and image quality
Include three-element field flattener to deliver pinpoint stars across APS-C or smaller sensors
Operates as a manual-focus f/4.5 apochromatic camera lens for astrophotography or as a guide/finder scope
Includes adapter for visual observation with a 1.25” eyepiece, tube mounting ring, and Vixen-style dovetail
The ASKAR FMA135 is a premium optical instrument that features a 30mm ED fully multicoated triplet objective to deliver superb image quality for astronomical and terrestrial imaging. It also works as a finder/small telescope/guide scope.
The heart of the FMA135 is an air-spaced 30mm apochromatic f/4.5 triplet with an ED element to minimize chromatic aberration. With a focal length of 135mm, the objective lens is optimized and tested for demanding astronomical applications, and it is carefully matched to an integrated three-element field flattener that yields flat fields and sharp images.
For the price, this fast apochromatic lens offers excellent value and can approach the performance of telescopes that cost three or four times as much. This is especially true when matched with astronomy cameras with smaller 1" and 4/3" sensors. Cameras with larger APS-C sensors may reveal slight aberrations at the edge of the field, especially when using the focal reducer. This lens is not recommended for use with full-frame cameras.
The camera side of the FMA135 includes a standard M42x0.75 male thread for attachment to most astronomy cameras or T-rings. The instrument has a 55mm back focus. The top tube ring, which acts as a light/dew shield, includes standard M28.5x0.6 female threads that accept 1.25” astronomical filters. The body of the FMA135 includes a rotatable focuser to ensure precise and repeatable focus.
For straight-through observing with an eyepiece, there’s a standard 1.25” adapter that threads onto FMA optical tube. The FMA135 also includes a mounting ring with standard Vixen-style dovetail.
The overall tube length is 113mm. The FMA135 weighs just 280g (0.62 lbs).
Specifications:
Aperture: 30mm
Focal Length: 135mm
Focal Ratio: f/4.5
Objective Type: Air-spaced APO Triplet (including an ED Glass). Sextuplet Refractor for APS Imaging
Overall Length: 113mm (photographic mode with flattener)
William Optics Long Version Vixen-style Dovetail Plate
LONG VERSION Vixen style dovetail # M-PV-LII
William Optics' new Dovetail Plate expands your options: you can now choose a fully-anodized WO product to mount your telescopes on Vixen-style mounts.
Highlight of the newAntlia LRGB V PRO 31mm, Unmounted
Improved contrast, star hypertrophy, and halo minimization compared with the previous Antlia LRGB V-series
Premium coating technology and finely polished substrate Our quality selection processes are optimized to ensure highly homogeneous glass-substrates. Our application of advanced optical coating technology and double-sided precision polishing achieves both consistent parfocal and optical performance across all filters.
Maximized colour balance and contrast for each of the three RGB channels and excellent S/N performance Dozens of coating layers are deposited on both sides of the glass substrate that enables LRGB-V Pro filters to achieve a high SNR. The Anti reflection coatings and carefully designed spectral gaps minimize unwanted light scatter and maximize useful signal data for each filter channel.
Tighter star profiles and halo reduction The cut-off rate of LRGB-V Pro series set is designed in high level to minimize halos around brighter stars and reduce star bloat. Our careful design of the blue channel transmission characteristics targets the problem of blue star bloating.
Strong, steady and easy to setup absolutely worth the price.
Low guiding error even at near payload capacity (4.5kg).
Easy polar alignment using fine adjustment knobs.
Low payload capacity suitable with small refractors best for traveling. With payload near capacity, weight management is essential because the counterweights included almost can not balance the kit.