I have less than half a night's worth of data, but so far, I am very impressed with the performance of the ASI2600MM Duo and Antlia filters.

This is replacing my ASI1600M Pro and Optolong filters. I chose Alnitak as my test target, to give the new camera (and filter set) a trial by fire. I only got about 18 minutes per channel of RGB dat

a, due to a focusing error after meridian flip, but I got enough to see how the 2600 sensor performs against the 1600. There are no "microlensing" artifacts whatsoever. Additionally, the Antlia filters showed no halo around Alnitak.

The color of the stars is also much better than the 1600, taking into account the relatively short integration time on target.

As I was also shooting narrowband with 3nm filters, I used an OAG rather than the Duo's guide camera. However, the Duo camera showed up as a choice in PHD2, no problems.

My one half-night with this camera has made me look forward to the next stretch of good weather. I believe that this is going to produce excellent images.

RGB subs = 180 seconds @ 0 gain, 18 subs per channel
SHO subs = 600 seconds @ 100 gain, 10 subs per channel

I believe it is a solid built product. I have not been able to use it yet but from all the reviews I have read it is a five star product.

This QHY adapter system leaves a lot to be desired. The kit I received contains:

Nikon Adapter (the enclosed documentation says 12mm rather than the 10mm shown in "What's in the box")
4mm screwed adapter
3mm adapter
1mm adapter
0.5mm adapter
2.5 mm Filter holder
14mm M3 screws

However, the diagram included

shows a 6mm spacer 'behind' the filter holder, which is not included in the kit!
The included adapters (not counting the Nikon adapter) are 11mm. Adding 6mm makes 17mm, but the included screws are only 14mm long?

I have other QHY adapter kits, so I was able to use a 5mm and 1mm spacer to make up the missing 6mm in backfocus needed. I procured M3 screws from Amazon (I used 20mm) to get the adapter attached to the camera.

Great quality! I'm using the cover for 12-14" scopes with my CPC HD 1100. It fits perfectly.

I'm glad I decided on a lunt.... in H alpha. Been using white filters for Sol observation for years, and was going to up da game via meade PST (price)..Meade is not the same company your father bought from. You can t beat the features, options available right from the factory. And professional service you get from Tucson.

I bought this filter with sole intention of observing the Horsehead nebula and expected it to not be useful for much else. However, much to my surprise, this filter greatly enhanced many nebulas I once thought impossible to observe. For example, the Rosette nebula was stunning with this filter in combination with my 12.5” dob. The monkey head nebu

la, NGC 2176, was also greatly enhanced with this filter. If you’re looking for a great filter to add to your collection, look no farther than this!