跳至内容

语言

Optolong variable polarising filter

库存量单位 12501
Available to order
Contact us for ETA
In stock
原价 $65.00 - 原价 $75.00
原价
$65.00
$65.00 - $75.00
现价 $65.00
当天发货

如果您下午 2 点之前下单,我们将当天发货。

专家售后支持

我们全力支持我们的产品!

至少两年保修期。

+ 延长制造商保修期

澳洲所有并库存

我们的商店为澳大利亚人所有并由澳大利亚人负责库存。

Adjust the brightness level of the Moon, Venus, and other bright objects with the Optolong Variable Polarizer. A standard Moon Filter is similar to a pair of sunglasses. They work fine, but sometimes the scene is too dark or too bright, and there’s not a lot you can do about it. A variable polarizing filter is much more flexible than a Moon filter. It allows you to set the percentage of attenuation by turning the top section of the two-piece filter. Simply attach the 2" threaded filter to a like-sized eyepiece or Astro accessory barrel, and then slowly rotate the top half of the filter—it turns 360°—to achieve the results you desire.

The Optolong Variable Polarizing Filter also works great to cut brightness when you are using your telescope for terrestrial observations or photography. If you have ever done photography through a SLR or DSLR camera, you may have already been introduced to the qualities of a polarizing filter, since it is a very popular accessory for polarizing the light and making the sky appear bluer. You will especially appreciate a polarizing filter when viewing over water or photographing a scene that includes a river or body of water. Simply turn the filter until you achieve the most glare-free results—you will really see the difference.

1.25 inch 2 inch
Brand Optolong Optolong
Type Variable Polarizing Variable Polarizing
Substrate Thickness 2mm 2mm
Clear Aperture 26mm 44mm
Surface Quality 60/40 60/41
Surface parallelism 1/4λ 1/4λ
Parallelism 30" 30"
Thread M28.5*0.6 M48*0.75
Single Thread Yes Yes