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699 EUR
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price without VAT: 568 EUR
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![William Optics Zenithstar ZS 61 II APO (dublet APO FPL53 61 mm f/5,9, 2\" R&P, Space Gray; SKU: A-Z61IITG) with free FLAT61A](images/150_wo_zs61-ii_sg_2020.jpg "William Optics Zenithstar ZS 61 II APO (dublet APO FPL53 61 mm f/5,9, 2\\" R&P, Space Gray; SKU: A-Z61IITG) with free FLAT61A") Shop online:
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The William Optics ZS61 ED refractor utilizes a doublet made of synthetic flourite glass. These optical instruments approach the performance of expensive APO triplets, but at a significantly lower price. The heart of this refractor is a two-element objective lens with a focal length of 61 mm, FPL53 glass, and an aperture ratio of f/5.9.
The tube is equipped with a very good 2-inch Rack and Pinion focuser with a 10:1 microfocuser, smooth-running, stable - you can rely on it.
The telescope has a retractable dew shield and a Vixen standard mounting foot, and the high quality of fit and finish has long been a hallmark of William Optics products.
So we have a beautiful "outdoor" equipment, especially recommended for astrophotography in wide frames, as well as an observation telescope and for digiscoping.
Now complete with a dedicated WO FLAT61A flattener for free. • design: Apo FPL53 doublet
• aperture: 61 mm
• aperture: f/5.9
• focal length: 360 mm
• extendable dew shield: included
• dovetail rail: included
• finder scope seat: included, also with a carrying handle
• Bahtinov mask: included
• soft bag with sponge filling: included
• extension: 2" Rack and Pinion, 1.25 adapter, 10:1 microfocus
• recommended flattener: FLAT 61A, FLAT61 R
• application: APS-C, Full Frame (gives a 43 mm diameter disc)
• length: 245 - 315 mm (depending on the position of the dew shield)
• weight: 1.45 kg 2 years
The William Optics Zenithstar ZS 61 II is a high-quality piece of equipment, lightweight and very well-made – like all William Optics products. The focuser is excellent, and the included Bahtinov mask makes focusing on stars very easy. I bought the telescope primarily for deep space photography, and it met my expectations. Below is a photo of the M31 galaxy (WO 61 + P-FLAT61R WO Z61 adjustable flattener, Canon 6D Mark II, full frame).
New Year's Eve
(click on the photo to see it in full size) OBJECT : Rosette Nebula
SETUP
Telescope: William Optics ZS 61/360 (without flattener!)
Camera: Canon 700D mod
Assembly: ZWO AM3 + ASIAIR mini
Date of execution: February 3, 2024
Exposure: 60 shots, ISO 1600, time 20 seconds/shot
The conditions were not the best, strong wind, passing clouds, lights of passing cars.
Location: ZHP Balcony Observatory, Frombork
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