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- My experience using two 80-millimeter long-focus refractors
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- Review: The Vixen FL55ss
- PrimaLuceLab Eagle Review
- interstellarum Deep Sky Guide Desk Edition
- Chronicling the Golden Age of Astronomy: A History of Visual Observing from...
- Omegon Mini Track LX2 Review
- Review of the APM 152 ED serial number 245
- THE BURGESS 24MM MODIFIED ERFLE & 10MM ULTRAMONO
- APM 140mm DOUBLET APO REFRACTOR
- Comparison of the Boltwood II and Sky Alert Cloud Sensors
- Chile Dilly!
CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.
Fujinon 150mm Binoculars
With the discovery of the Hyakutake comet the worlds largest binocular has become known to the general public. Fujinon binoculars have been predominently used in the marine environment and are extremely robust and water resistant. The nitrogen filled interior prevents dew formation of the internal optical surfaces.
The "normal" MT-optics are already very good and free of reflections, of course completely A/R coated, without any perceptible distortions or color fringing. On the ED and EM models the objectives are apochromatic, with faultless clean definition. The 25x150 is the maximum solution for the observation of low light level, large area structures.
The combination of two times 150 mm apertures, 6 mm exit pupils and 2.7 degrees field of view, is unique, but not only ideal for comets. Just a view in the milky way produces a breathtaking experience. To the very edge of the large field of view a massive amount of needle sharp fine stars, limiting magnitude approximately 13m5, completely true in color. M22 is like a swarm of bees. The whole sky seeded with countless nebulas and torn fragments of thereof. Cirrus-, Hantel- (M27), Trifid-definitiv, structured, glass clear. North-America- explosively bright. Pelican- explicit to the last detail.
Viewing objects reveals their names instantly. One sees a pelican or eagle as soon as the nebula area is in the field of view. The large field results in an adequately dark surrounding background, while the immense light and contrast delivery gives distinct images to even the weakest extensions. Objects known for their low surface brightness such as M101 do not have to be searched for, they are there, quite simply. During a casual look thru the sky I suddenly noticed a saturated patch of light. It took me a few seconds, til my astonishment made me realize that it was M101, sharply defined so to speak, a 3-d button in the sky.
With the 25x150 one can spend hours aimlessly viewing and coming across many interesting objects by chance. From M51 with his spiral structure to the gigantic M33 failing in nothing compared to a good photographic image. The advantage of seeing with both eyes is particularly evident on large dimly illuminated structures. We where able to see the horsehead nebula without a H-Beta filter. To do this you need a 20 inch single vision scope.
Copyright 1994-1998: Martin Birkmaier / Intercon GmbH, Augsburg, Germany. Used by permission.