Svbony CLS clip EOS-C filter review

Фильтр Svbony CLS clip EOS
Svbony CLS clip EOS-C filter

The problem of urban illumination is becoming more and more important every year – new houses, new roads, illumination, thoughtless design of urban lighting lead to the fact that the sky turns into a solid orange canvas, and because of the bright background it is impossible to capture even bright nebulae. The situation changed dramatically after the appearance of specialized light pollution suppressor filters for astrophotography. The use of interference coatings made it possible to cut off unnecessary regions of the spectrum — for example, the emission lines of mercury and sodium lamps, and to transmit the regions of interest — emission lines of hydrogen and oxygen.

There are several varieties of  light pollution filters — broadband and narrowband. In broadband filters include CLS (City Light Suppression), LPR (Light Pollution Reduction), UHC (Ultra High Contrast), UHC-S. They may be under different brands, but they have one task – to weaken the illumination of city. The UHC bandwidth is narrower in the green area, they are more suitable for heavily exposed areas, but it’s harder to get the corrent white balance. The usual bandwidth in the green region is from 20 to 75 nm. The narrower the filter, the darker the background is. Also, CLS UHC filters can pass the red region of the spectrum – this is not important for visual observation, but it is very important for photography, since the emission line of hydrogen nebulae (H-alpha) is in that area.

Astronomical products on Aliexpress

Perhaps there are not enough people left who have not heard about Aliexpress. The largest Internet site where you can find almost everything – from toothpicks to an airplane wing. Of course, there are also astronomical products there, and even taking into account the delivery, the cost of this or that accessory is less than what it costs in local stores. In this topic, I will try to make a list of interesting astronomical products, useful for amateur astronomers – both beginner and experienced. On aliexpress, I mainly buy small things – eyepieces, mounting plates, lights, adapter rings and much more. When buying, try to choose China Post Registered Air Mail delivery, or ePacket, even if it is paid – such packages are correctly tracked and reach faster.

Warning: I do not bear responsibility for the defective goods and can not vouch for sellers. Carefully read the reviews for the product and choose a seller with a good reputation. But even if an unqualified product arrives or with defects, for these cases there is a “dispute” with the seller (“disput”), during which you can partially or even fully return the money for goods of inadequate quality. It is advisable to remove the unpacking of the parcel on video, so that you can then make a complaint. I also recommend specifying in the comments to the order that the seller check the goods before shipping (for example, “Please check the goods before shipping. There should be no defects”.)
Enjoy the shopping!

New interesting products will be added on top.


Svbony SV182 6×30 right angle finder
Lightweight, compact, good image and most importantly, completely right image. An erecting 90-degree prism is used to break the optical axis. Recommend!

SVBONY SV182 6x30 finder
SVBONY SV182 6×30 finder


Short cheshire eyepiece. Designed for aligning mirror telescopes. Fully metallic. The quality is excellent. Recommend!

TMB eyepieces with 4 mm focal length.  Inexpensive eyepieces with long eye relief and good image quality across the field. Recommend!

Finderscope Bracket for 3 finders. Completely metal, high quality. Several finders + guider can be fixed at the same time. Recommend!
Light pollution filter Optolong L-eNhance clip Canon EOS. Designed for APS-C Canon DSLR. Perfectly reduce light pollution, passes H-alpha, OIII and H-beta. Strongly recommend!
Optolong L-eNhance 1.25″ version.
Coma corrector SharpStar 0.95x. Suitable for sensors up to APS-C format. Perfectly corrects coma, does not add spherical aberration. At the exit he has a thread M48x0.75, do not forget to get a correct ring. Recommend!

WITHOUT COMA CORRECTOR.. Sky-Watcher BKP150750 + Canon 550Da
WITHOUT COMA CORRECTOR. Sky-Watcher BKP150750 + Canon 550Da
WITH COMA CORRECTOR SHARPSTAR 0.95x. Sky-Watcher BKP150750 + Canon 550Da
WITH COMA CORRECTOR SHARPSTAR 0.95x. Sky-Watcher BKP150750 + Canon 550Da

Focal Length Extension Tube Kits М42х0.75 3/5/7/10/12/15/20/30 mm thick. Metal, workmanship is excellent. Useful for selecting the focal length of an astronomical camera. Recommend!


Svbony Adapter M48-1.25″, T2-1.25″, 2″-1.25″ (optional) with quick-release soft clip. Does not leave scratches and damage on the installed accessories. Budget analog of adapter Baader ClickLock. Fixes firmly and securely. I ordered this myself for mounting the QHY5III178m camera, as there is the slope of the sensor plane with a conventional adapter.

Svbony adapter T2 M48 2 to 1.25

Lightweight, compact, metal tripod Q999. I use it with a Sky-Watcher Adventurer mount and lenses with a focal length of up to 50 mm. For a 135 mm focus, preferably a tripod is stronger, but if you take a hike, where every gram of weight is important, then this one will do. Suitable also for small binoculars and spotting scopes. One of the legs is unscrewed and can work as a monopod. Includes a bag and a good ball head. Recommend!

QZSD Beike Q999
QZSD Beike Q999

Carbon version (Q999C)


Pocket prism spectroscope. Inexpensive plastic, but works well for its price. Suitable for testing astronomical filters. The case outside is better to glue the black opaque film, so that there is no parasitic flare. The gap is narrow (this is good). There is no enlightenment (and not really needed). Easy to understand, can be upgraded.
Mini spectroscope
I bought it from this seller with the delivery of an e-packet, I got it from China in 16 days.
My review:

Eyepiece 32 mm 1.25″. Inexpensive viewing eyepiece, which is useful to obtain a minimum increase.

Окуляр 32 мм
Eyepiece 32 mm


Celestron X-Cel LX 7 мм

High-quality and wide-angle (60 °) eyepiece – works great even with fast telescopes. Pleasant pupil removal (14 mm), metal body, excellent blackening is a logical replacement for the short focus plossls. Recommend!

Celestron X-Cel LX 7 мм.
Celestron X-Cel LX 7 мм.

My review:

Filter for astrophotography Svbony CLS clip EOS. It works only with Canon mirror cameras (APS-C format). Does not work with Canon EF-S lenses. Excellent suppresses urban light pollution, highlighting the nebula. When using modified cameras and lens optics, it is desirable to use an external IR-cut filter.

Finderscope Dovetail Slot Multi Function. Metal, with two clamping screws.


Power Adapter for Canon 450D 500D 1000D SLR Cameras. Works on USB.

Same power adapter for 550D 600D 650D 700D

Zenith mirror Svbony 1.25″
Inexpensive, but with good quality. I recommend to replace the complete prisms.

Erecting prism of 45 degrees. Without coating. Suitable for ground-based observations with refractors and catadioptrics.

Rare ring M42x1> M42x0.75 (T2). Made well, no complaints. Suitable for Soviet lenses such as Jupiter-37A.
M42x1 to M42x0.75 (T2) ringLink:

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