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IC 1805 by Cy Borg

Optical accessories that decrease focal length and increase field of view.

Showing 1-50 of 100

	Replies	Views	Created
TS Optics 115/805 Photoline with 0.8 reducer - elongated star issues? TS-Optics Photoline 115mm f/7 Reducer Refractors +2 Harald Becher Last post: andrea tasselli	1	81	2 days ago
Andromeda galaxy captured with 6 hours of exposures from Borrego Springs Sky-Watcher Esprit 100ED Pleiades Astrophoto PixInsight ZWO ASI2600MC Pro +6 lblock	0	84	25 days ago
my 1st hubble palette attempts... Hubble Palette Group CMOS Filters Reducer +4 Larry Cable Last post: Larry Cable	3	145	Sep 25, 2025
Starizona Nexus .75 reducer Coma Corrector works perfectly with 2600MC AIR/DUO ZWO ASI2600MC DUO Starizona Nexus 0.75x Newtonian Focal Reducer/Coma Corrector (NEXUS-075)ZWO ASI2600MC AIR ZWO ASI2600MC DUO +1 Michael Gehrisch Last post: Michael Gehrisch	2	165	Sep 16, 2025
Upgrading from Quattro 200CF to 300P: seeking owner experiences and advice Sky-Watcher Quattro 300P iOptron CEM70-NUC Sky-Watcher Quattro Coma Corrector +5 Ivan Last post: Ivan	24	572	Aug 28, 2025
Definition of Widefield?? Sky-Watcher Quattro 250P / 10-S Equipment Reducer +2 Sam Badcock	0	82	Aug 6, 2025
TSRCRED-G2 spacing with your RC Equipment Reducer Ritchey-Chrétien Stellar Nomads Last post: Stellar Nomads	2	57	Jun 1, 2025
ESPRIT 100 + RICCARDI 0.75 REDUCER BACKFOCUS ADJUSTMENT. CRAZIEST! Sky-Watcher Esprit 100ED ZWO ASI2600MC Pro Reducer +1 Jandro.rm Last post: Olivier Constans	42	1.5k	May 29, 2025
Back Focus on MoonLite 3.5" NiteCrawler with the 645 reducer QE 0.72 Takahashi FSQ-106EDX4 Reducer Todd Charlson Last post: Todd Charlson	24	339	May 26, 2025
Esprit 120ED with 0.77X Reducer Sky-Watcher Esprit 120ED ZWO ASI294MM Pro Reducer +1 AstroDarks Last post: AstroDarks	25	698	May 12, 2025
Proper backfocus with x0.63 reducer Celestron C8 Optolong L-Pro Reducer +2 Vitaly Last post: maxchess	7	325	Apr 22, 2025
IMAGING WITH C11-CORRECTOR SUGGESTION Celestron C11 Reducer Flattener Filippo Bonfante Last post: Filippo Bonfante	7	176	Mar 1, 2025
Celestron SCT reducer for a small sensor Reducer Acquisition Deep Sky Tony GondolaFrequent contributor Last post: Jonathan Monestel	26	634	Feb 5, 2025
[RCC] My First Imaging Attempt with GSO RC 8” Carbon Ritchey-Chrétien Reducer Request for feedback +1 maxbaro Last post: Joseph Biscoe IV	6	435	Jan 30, 2025
Focal reducer for TOA 150 Takahashi TOA-150B Takahashi TOA-150 Reducer +1 N Foldager Last post: andrea tasselli	4	133	Jan 10, 2025
Starizona SCT Corrector IV - 0.63X Reducer / Coma Corrector (Backspace requierments)? Celestron C8 ZWO ASI2600MC Pro ZWO ASIAIR Plus +2 Ed Litoborski Last post: Craig Harding	12	339	Dec 22, 2024
Edge 9.25 without Reducer Celestron EdgeHD 9.25"Equipment Reducer Jerry Gerber Last post: JohnAdastra	47	1.9k	Dec 9, 2024
Sky Watcher Esprit 100ED with TS-Optics 2,5" 0,8x Reducer? Sky-Watcher Esprit 100ED Reducer pmneo	0	118	Dec 4, 2024
TOA-35r reducer for TOA-130 performance on Full frame sensor Takahashi TOA-130 Reducer Refractors Ashraf AbuSara Last post: Andy 01	13	365	Nov 20, 2024
Best EdgeHD 8" Reducer? Celestron EdgeHD 8"Reducer Buying Advice Derek Vasselin Last post: V	1	248	Oct 27, 2024
New reducer for Takahashi FSQ 85. Any impressions? Equipment Reducer Emanuele La Barbera	0	54	Oct 2, 2024
Great optics but watch out for OTA working distance requirement TS-Optics TSAPORed075 Reducer Refractors AstroBillUK	0	139	Sep 22, 2024
EdgeHD 9.25 w/ 0.7x Reducer and 2" Esatto Questions Celestron EdgeHD 9.25"Focuser Reducer Joshua Carter Last post: Jerry Gerber	33	994	Sep 14, 2024
ZWO ASI2600MM with Takahashi 120 TSA ZWO ASI2600MM Pro Reducer CMOS Jeremy Phillips FRAS Last post: Antonio Parisi	6	365	Sep 2, 2024
Strange scope-reducer question Askar 65PHQ Reducer Acquisition +1 Sean Mc Last post: Sean Mc	10	231	Aug 25, 2024
Reducer or not Equipment Reducer Refractors Anderl Last post: Simon Pepper	5	269	Jul 28, 2024
FRA600 Reducer Rotator Askar Telescopes Askar FRA600 Reducer Rotator Alaa El Bedewi	0	37	May 31, 2024
Esprit 80 with STarzonia Apex 0.65x reducer? Sky-Watcher Esprit 80ED Reducer Refractors ScottF Last post: ScottF	3	211	May 22, 2024
Focal length of GSO 10" RC GSO 10" f/8 Ritchey-Chretien Ritchey-Chrétien Focuser +2 Götz Golla Last post: Götz Golla	22	938	May 12, 2024
0.65x Reducer with Askar 120APO Askar 120APO Reducer Refractors Yves Ouellette Last post: nmac	6	665	Apr 27, 2024
Newbie question: Telescope --> Reducer -> Flattener -> Filter --> Camera ... Distance & backfocus mess ?!? Equipment Flattener Reducer Joerg Last post: Tim Ray	14	278	Mar 17, 2024
PlaneWave CDK14 Reducer Planewave CDK14 Reducer Troubleshooting Ani Shastry	0	116	Feb 17, 2024
What Reducer to use with the Explore Scientific ED APO 127 Explore Scientific ED APO 127mm f/7.5 FCD-100 CF HEX Refractors Reducer Christian Großmann Last post: Christian Großmann	15	675	Feb 2, 2024
Testing the New Takahashi QB0.73x Reducer for a Full Frame Camera on the FSQ-85 EDX Takahashi FSQ-85EDX Reducer Deep Sky Bruce Donzanti Last post: AnakChan	25	1.9k	Jan 18, 2024
Askar 103 APO 0.6x Reducer Askar 103APO Reducer Refractors Dark Rangers Last post: Alex Nicholas	17	2k	Jan 4, 2024
Williams GT71 scope with reducer for sale. Equipment Refractors Reducer Dan Kearl	0	140	Nov 18, 2023
C8, Baader focuser and a Starizona SCT corrector Equipment Flattener Reducer Mike H - Sky View Observatory Last post: Lynn K	7	226	Nov 5, 2023
Will it ever end? ZWO ASI120MM Mini Equipment Reducer Sean Mc Last post: Quinn Groessl	5	403	Oct 24, 2023
Please help: comparing two fl, f ratios, pixel scale, etc Reducer Acquisition Optics +1 Sean Last post: Sean Mc	2	176	Oct 15, 2023
telescope speed ... F4.0 vs F5.6 ..twice as fast for double the price ? Askar FRA400 Askar FRA500 Equipment +2 Tobby Last post: Arun H	48	2.7k	Oct 7, 2023
New scope and flattener/reducer William Optics Fluorostar 91 / FLT91 ZWO ASI294MC Pro Flattener +2 Shane Last post: Sean Mc	10	427	Sep 12, 2023
Esprit 100 & Starizona 0.65 Reducer Sky-Watcher Esprit 100ED Reducer Coma Christian Schulbert Last post: Christian Schulbert	4	669	Sep 6, 2023
Riccardi x 75 Reducer Sky-Watcher Equinox 100 Reducer Christian Vulpescu Last post: Christian Vulpescu	3	212	Aug 15, 2023
Backfocus using Skywatcher Esprit 120ed Reducer/Flattener Sky-Watcher Esprit 120ED Reducer Focuser Tahir Last post: Dan Kohn	20	1.4k	Aug 11, 2023
Esprit 150 and 0.77x reducer Full Frame expectation Skywatcher Esprit ED Super APO Triplet Refractors Reducer Deepan Vishal	0	92	Aug 4, 2023
Esprit 120 .77x reducer backfocus Skywatcher Esprit ED Super APO Triplet Reducer Troubleshooting Matthew Proulx Last post: Matthew Proulx	10	153	Jul 31, 2023
Are Reducer/flattener "universal" for any refractor with the same focale length? Sky-Watcher Esprit 120ED Reducer Flattener +1 Stephane Perroud Last post: Tony Gondola	14	689	Jun 29, 2023
image train sanity check. ZWO ASI183MM Equipment Ritchey-Chrétien +1 Sean van Drogen Last post: Joe Linington	9	388	Jun 20, 2023
Starizona 2” sct6.3 iv reducer Reducer Focuser Acquisition +1 RammaN Last post: Steve Spring	16	596	Apr 27, 2023
SVX080T-3SV with the Starizona Apex ED .65 reducer?? Stellarvue SVX080T-3SV Reducer Refractors MikeY_Astro Last post: MikeY_Astro	8	219	Apr 14, 2023

Showing 1-50 of 100