Focal reducer vs field flattener

Author: pzdx

August undefined, 2024

WebThis field flattener and focal reducer package is for the Explore 152 or 127 Triplets with 3" focusers. Flattens the field beautifully and reduces effective focal length by 0.7X. 55 mm of back focus from rear flange. Includes 3" adapter and M42 photo adapter. Optional adapters available for 2.5" HEX focuser & 2" focuser. WebOct 11, 2008 · This report is an initial comparison of the following focal reducers using the same visual and photographic tests on a Meade 8" LX90-ACF. Meade f/6.3 Series 4000 …

Do focal reducers & field flatteners effect chromatic aberration?

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 … WebJul 24, 2024 · A better option would be the tunable reducer offered by william optics. You don't mention what camera you are using, if it is smaller than an aps-c then you could be a guinea pig and try the long perng .6x reducer flattener. This would give you F4.8 at 974mm, and personally I would gamble on better coma correction than the ccdt67. how much should a pastor earn

C11 HD Hyperstar or reducer? - Imaging - Stargazers Lounge

WebJun 21, 2024 · Refractor Focal Reducer/Field Flatteners. Each major refractor manufacturer also makes focal reducers to work with their apochromatic or ED scopes. Often combined with field-flattening elements, these reducers are available with a reduction factor of 0.7x-0.8x for refractors with a focal ratio of about f/6 to f/7.5. WebMay 25, 2024 · First you would have to shorten the tube because a focal reducer brings the focal plane closer to the objective. Then you would need to design a new module that included a shortened focuser and a way to robustly mount the flattener/focal reducer to this new focuser module. That module would need some way to align it with the objective. how much should a pastor be paid

SvBony Sv503 ED102mm F/7 Telescope Review - Cloudy Nights

WebThe required distance varies from ~100 to 130 mm as the telescope focal length increases from 450 to 800 mm. It does work very well. The table shows the required separation between the rear of the flattener and the camera sensor. ♦ focal length < 450 mm: 128 … WebJul 18, 2024 · A 0.85x Focal Reducer / Flattener will change the scope to a f/5 at 357mm for the focal length. It will make the scope photographically faster and give you a wide field of view. The Astro-Tech Field Flattener may be a good fit but you will have to play around with the back-focus to get optimum stars. how do stoves workWebMay 19, 2024 · SV193 focal reducer and field flattener uses M54x0.75 thread; and the 2 inch connector after the CAA needs to be removed when in use; The connection … how much should a patio cost

"WebThis William Optics Focal Reducer and Field Flattener provides f/6 to f/7/8 focal ratio refractors with 0.72x reduction in effective focal length. Features an STM-coated, fine doublet air-spaced designed lens made using only top-notch Ohara optical glass. Provides coverage for DSLR cameras with full size 50 mm clear lens aperture. " - Focal reducer vs field flattener

Focal reducer vs field flattener

f/6.3 reducer spacing for SCT - Cloudy Nights

WebMay be used to increade field of view and reduce magnification for visual applications. An important advancement in high-resolution focal reduction systems, the Meade 4-element, multi-coated f/6.3 Focal Reducer/Field Flattener threads on to the rear cell of any LX90, LX200 or other Schmidt-Cassegrain model and is typically used with an Off-Axis ... WebJul 28, 2024 · It does need a flattener for best results. The dedicated flattener ceased being produced not long after the scopes came out - WO seem to have a habit of doing that. The dedicated flattener did flatten but it also made the scope a bit slower, something like f/6.2, instead of the f/5.9 or whatever it is. Imagers were a bit unhappy with that.

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WebSep 13, 2024 · There are four new models of the Astro-Tech focal reducers and field flatteners designed to fit specific Astro-Tech refractor telescopes which include: – AT80ED .8x Reducer/Flattener: The dedicated fully-multicoated Astro-Tech AT80EDRF converts the 560mm focal length f/7 Astro-Tech AT80ED refractor into a 448mm f/5.6 system. WebJun 18, 2006 · All today's focal reducers of a notable power (from 0.8x to 0.6x) add some lateral color aberration. This aberration makes star images looks like small short spectras not as pinpoint round small dots. They also can introduce secondary color aberration. Field flatteners haveing almost no power do not introduce lateral and secondary color. Valery

WebSep 26, 2024 · Yes, because the LF reducer needs the large, 3.29" backend to give that huge image circle. The C9.25 and below don't have that. So yes, I guess if somebody wants flattened, coma-corrected, large-format (42mm) images with a smaller (9.25", 8") SCT, then the EdgeHD is the way to go. WebThe non-reducer flattener's back focuse distance, T-Thread shoulder to the CCD chip, requirement is 55mm. SCA Damps Vibration The all-around adjustable tightness rubber contact damps unwanted vibrations from the telescope provides you a sturdy attachment on your telescope for a stable image capture. The 2" Field Flattener Accepts 2" Filter Thread

WebOftentimes, a field flattener also has focal reducer capabilities, so you can get wider shots out of your scope. Be sure to check each field flattener we carry to see if you can use it … WebAstro Essentials 0.5x 2" Focal Reducer. £39.00 Add to Basket. StellaMira 2" 0.8x Reducer / Field Flattener with M42 Adapter (3) £89.00 Add to Basket. StellaMira 2" Field …

WebSep 26, 2024 · Antares f/6.3 has focal length of 220mm and a diameter of 40mm = (82mm) Meade f/6.3 has a focal length 260mm and a diameter of 40mm = (95mm) Celestron f/6.3 has a focal length 284mm and a diameter of 40mm = (105mm) The further out you are from the sensor, the greater the reduction and vignetting.

WebJun 13, 2024 · Focal reducers also move the effective focal plane of the objective inward, that is, towards the objective (see Figure 1). The more focal reduction, the further inward … how much should a patterdale terrier weighWebFeb 2, 2024 · If you add the f/6.3 focal reducer/field flattener to the rear port, you can stick with 1.25" eyepieces, and not convert the back end to 2" (saving money), There are a lot of nice inexpensive eyepieces that would serve you well. I recommend the 58-60° apparent field eyepiece that retail for $65-$95 each. how do straight jackets workWebApr 21, 2024 · As with all refractors, a field fattener or field fattener-focal reducer is recommended for imaging purposes but it is unusual to use such an adaptor for … how do stovetop percolators workWebMay 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 … how much should a pc costWebApr 23, 2024 · No, reducing the focal length increases the field of view. With a given aperture you can reduce integration time by using a more sensitive camera, binning the capture or by using larger pixels. The hyperstar would bring it to F/2, making it a whopping 26 times faster than at f/10. Wrong. Don't be fooled by the Hyperstar website. how much should a person consume pdfWebThe Reducer/Corrector is easy to install by threading the unit onto the rear cell of your Schmidt-Cassegrain telescope (or the reducer plate of the C11 and C14). Once installed, you can add additional accessories like T-Adapters, 1.25” Visual Back, Star Diagonal, or Off-Axis Guider. The Reducer/Corrector can also be used for terrestrial ... how do stovetop espresso pots workWebSep 30, 2012 · I have the AT130EDT with a FL of 910mm. I have added the Hotech 1x Field flattener to it which has a BF of 55mm. Things look alright on my small 533mc sensor and relatively flat, although I have not actually ran a measurement. Now when I let the ASIAir calculate my FL, it comes out either at 902 or 903mm with the field flattener, so it has … how do straddle options work