Orion V-Block

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Brand and Model:Orion V-Block
Price ($USD):$75
Type:violet fringing reducer
Filter Position:
un-checked .96" checked 1.25" un-checked 2"
un-checked Visual Back un-checked Full Aperture

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Orion V-Block
We've all heard various complaints about chromatic abberation present in achromatic refractors... My Orion V-Block filter works miracles on my Sky-Watcher 120mm f/8.3 refractor to say the least. The planetary views through my telescope were already very crisp and pleasing, and I would go so far as to argue that this filter (very much like the Sirius Optics Minus Violet filter) actually increases resolution. I am not disappointed my the slight yellowish cast this filter imparts as a result of eliminating the violet from the spectrum due to the enhanced contrast. The Moon, Jupiter, and Saturn were wonderful objects to test this filter on. At low powers, they all had slight greenish halos without the V-Block. When the filter was employed, not only was this visual annoyance removed, but I could easily boost up the magnification substantially more than I normally could have without the V-Block. These two beautiful planets literally burst into an array of belts and zones I have only seen in much larger telescopes. Saturns rings also became extremely sharp. With the filter, the Moon boasted countless tiny craterlets and ultra sharp detail. Once again I fell in love with the source of light pollution deep sky enthusiasts sometimes grovel about. As a matter of fact, a good friend and avid deep sky person raved about the views I showed him that first night using my Orion V-Block. He claimed the planetary views were among the finest he'd ever seen..and much better than his 11" SCT with premium eyepieces. Was it worth the purchase? Definately, in my opinion. Aside from the yellowish cast, it makes a well collimated achromatic refractor seem nearly apochromatic. An inexpensive way of significantly improving the quality of observing the planets!

Overall Rating: 9
Optics:9 Value:9
Weight: 5 (Veritable Vote)
By: aurora
Link to this vote: http://www.excelsis.com/1.0/displayvote.php?voteid=324207

Orion V-Block
This filter may be the best of the bunch out there.
Some companys really know how to hype up thier products.
this filter has the best light thoughput i have seen.
great on fast refractors with a slight color shift towards
yellow. allows you to increase magnification due to almost
a complete removal of the purple. can be left in the diagonal.
orion has recently dropped the price on these. out of
all the filters i have looked though , this one is the keeper.

Overall Rating: 10
Optics:10 Value:10
Weight: 1 (Unreliable Vote)
By: Anonymous (xxx.xxx.116.202)
Link to this vote: http://www.excelsis.com/1.0/displayvote.php?voteid=361197

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