SVBONY Telescope Filter UV IR Cut Block Filter Infra Red Filter CCD Camera for Astrophotography Telescope UV Filter 2 inch Threads for DSLR Camera

Good quality at a reasonable price, as expected from Svbony.

Editing my review. I’m not sure if the gradient is normal, because I don’t have experience with other qualities of filters. But, I will say the seller reached out to me to offer a refund. Before I took it I decided to try this filter again, using new (better and way more in-depth) processing software I’m getting familiar with. I found that even with a gradient visible, I’m able to correct it in my images and it doesn’t seem to affect the outcome. I included a second photo with this update of NGC1499 (keep in mind this is heavily processed), showing no signs of the color gradient. I’ve had the same results through the handful of other targets I’ve imaged since trying it again.I’m happy enough continuing to use it and experiment with results with and without the filter, and decided not to take the refund offer - thanks to the seller for offering it though, for that reason I’m leaving this review as 5-stars. I’m leaving my original review below, for transparency, but I think it’s a non-issue. I do wonder if expensive name brand filters would show the same thing, and I almost expect they would.————————————Previous review:Not sure if it's because I'm using it with a camera with a large sensor size, but it shouldn't happen. I finally got a new mount and got to test my new setup, 4 days outside of the return window for this filter... Didn't get far into testing before I realized every shot with this filter had a very noticeable red>blue gradient across the image.The image I'm adding here is several 3 minute exposures of M31 stacked and lightly edited with ASIstudio to try to get rid of some of the gradient without removing the details I want in the image. As it is, I can't use this filter, and already removed it from my rig. I had high hopes based on recommendations.

This filter works just fine as a UV / IR filter. A good value purchase for sure. Svbony does make a good product at a fair price.

The nominal performance and the price is great. One disappointing thing is that under high illumination I could see that the brand new filter had some small stains on the surface.It also had some dust on it.The dust I can clean with a blower and a camel hair brush. The stains though...or maybe it is a finder print residue, I hope not......would require solvent and kim wipes, and I just dont want to do that.I don't like this because flat frames do not perfectly correct for illumination non-uniformity. I would rather have perfectly clean filters. I care about that more than the spectral performance.

Very good product

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For the price, I keep them permanently mounted on my Tele Vue Power Mates and Field Reducer / Flattener. For those that say the optical quality is not there, I challenge you to compare. Do you really think Tele Vue or Baader make their own filters? I doubt it. They send the specifications to China or Taiwan and it is made there. Then re-badged and sold under different names. Svbony, although Chinese, makes very good and inexpensive components.

Just wanted to make sure for others who order this as this has thicker profile and if you try to use it with the 1.25 Filter Wheel that connects to the telescope and Astro camera, this doesn't work and still stays just a bit out of filter wheel frame and blocks rotation. otherwise nice packing and clear well defined glass.

Recomendado, cumple su función a la perfección y con un mucho mejor precio que otros filtros del mismo tipo. El enfoque para las fotos es más fácil y el resultado final también es mejor. No es una diferencia muy grande pero si se nota. Sirve para fotos de Luna, planetas y espacio profundo en lugar de los filtros anti contaminación lumínica. Además se puede usar para la cámara de autoguiado ya que permite también hacer un enfoque mejor de las estrellas y elimina un poco la aberración cromática. Por cierto, también se puede usar para observación. Así que consideren comprar uno.

Works well as I need tight stars for guiding.Gives a good result.

Top Filter für kleines Geld

Muy buen filtro para observación, pero sobre todo para fotografía.