Focal reducer lens elements gso
WebFeb 21, 2010 · If the reducer-to-focus distance is longer than 1/2 the reducer's focal length, the reduction factor will exceed 0.5X, which for a simple lens is too aggressive. The 0.7X reducer's longer working … WebJul 25, 2024 · The 0.67 focal reducer seems quite popular with F/8 RCs. Check if you are considering one, that it is large enough to fully illuminate the sensor you are using. The other obvious "issue" with using a focal reducer is that the object you are targeting will be much smaller in the final image. The decreased imaging time doesn't come for free!
Focal reducer lens elements gso
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WebJan 27, 2024 · From the specifications of the reducer: "the "working distance" of this specific reducer is estimated to be 53mm, i.e., this reducer will provide a reduction of 0.5x when the center of its lens assembly is placed 53mm from the focal plane of the eyepiece or imaging device".Apparently, the reduction varies with focal distance, so a slight mismatch on the … WebSpecifications. Reviews. A high quality 2x achromatic Barlow lens from GSO. It is an excellent quality 2-Element achromatic Barlow lens that will double the focal length of …
WebGSO 6x30mm Straight Through Finder Scope with Mounting Bracket (Base Not Included) $44.00. In Stock. More Info. Free US Shipping. GSO 1.25" 2x "Shorty" Achromatic Barlow Lens # GS2BL. $33.95. In Stock. Add to Cart. WebSep 26, 2024 · The focal length of the reducer is the distance at which light that entered the reducer "from infinity" (meaning: parallel light rays), is forced (by the reducer) to converge to a single dot. This image shows the "firestarter" method of measuring focal distance of reducers using the Sun as the source of parallel light rays:
http://www.gs-telescope.com/content.asp?id=136 WebThe image quality is comparable with three-element lenses. The telescope can be used visually without any restrictions and, thanks to the optional field flattener and focal reducer, there is also no obstacle to astrophotography. The advantages and features of the Photoline 125 mm f/7.8 apo:
WebThe new TS Photoline 150 mm f/8 Apo convinces with its high optical performance, neat chromatic correction and very good mechanics - with large 3.7" focuser for astrophotography with large sensors. ♦ Aperture 150 mm / focal length 1200 mm / focal ratio f/8. ♦ Very good chromatic correction due to color-pure imaging by "Extra-Low-Dispersion ...
WebMay 12, 2024 · Petzval design vs Triplet with a flattener - posted in Refractors : I am looking for a quality refractor with a focal length in the range of 500mm to 700mm. One of the questions I have is what are the inherent advantages or disadvantages of these designs, if any. I am most familiar with Televue and Stellarvue and they both have scopes in that FL … how many teaspoons in 6 mlWebThe GSO 0.5x focal reducer provides a nominal reduction of 0.5 times. The actual focal length reduction will vary a little over or under 0.5x depending on where the focal … how many teaspoons in .5 cupWebEffective focal length: 414 mm (with corrector/reducer TSRED25DEL) Effective focal ratio: f/4.4 (with corrector/reducer TSRED25DEL) Objective: Air-spaced triplet objective with two ED elements: Focal ratio of the objective: f/5.5: Focuser: 3" rack and pinion focuser with M74x1 female thread connection and 2" / 1.25" receptacle: Drawtube travel ... how many teaspoons in 5 ouncesWebNative 0.5x Focal Reducer; 0.33x Reduction with 20mm Extension Tube; Four-Element Lens Design in Two Groups; Produces Wider Field of View for Imaging how many teaspoons in 5 millilitersWebGSO's new 2" 0.5x focal reducer screws on to any accessory (such as eyepieces, camera adapters, etc.) that accepts standard 2" threaded filters (with M48x0.75 specification … how many teaspoons in 8 oz dryWebThe TS CF-APO lens. The powerful air-spaced triplet lens has two APO elements. One of them is made of FDC100, which is comparable to FPL53. The result is good chromatic correction despite the relatively fast f/7 focal ratio. The elements are of course adjustable and are optimally set before shipping. The mechanics of the TS CF-APO how many teaspoons in 8 oz liquidWebFocal Reducer for viewing/imaging DSO with f/12 Classical Cassegrain I'm considering a GSO 8" f/12 Classical Cassegrain which should give me great lunar and planetary views, but I would also like to view DSO with it as well. Would a 0.5x focal reducer work well to allow for DSO observation and basic astrophotography? how many teaspoons in 90 mg