pietervdv

This is a very cool picture, always interesting going for the ultra faint stuff! Pieter

This is a very nice image and object! Never seen it before... What is the image scale of your system ? Pieter

Hi Olly, Sounds like you owe me a beer for this great tip. ? I'll also go for it, I can tweak my imaging train to fit the 1,25" version in. Want to get into the faint planetary nebulae, guess I'll find out what it's worth pretty soon. Pieter

Triangular shaped stars are often caused by pinched optics. Is your primary mirror still properly supported? Pieter

Hi, Does anyone have any first hand experience with this filter? https://www.astroshop.eu/oiii-filters/baader-ultra-narrowband-4-5nm-oiii-ccd-filter-1-25-/p,62162 Curious to know how it compares to the 8,5 nm filter which I owned in the past and was not very impressed with. I am considering this as an alternative for the 5nm Astrodon o3. Thanks, Pieter

Very nice image, not pushed to far in processing. Looks very natural, I like this a lot. Pieter

Thanks! You only see the double diffraction spikes out of focus. You also see them when the spider vanes are not well aligned. The double spikes converge when in focus. The double spider is a very stable and great focus aid!

Hello all, A year since my previous post on the deepsky forum, I have worked on another ultrafaint supernova remnant the last 2 weeks, G182.4+4.3 in auriga. I only found one other amateur image of it on the web which served as inspiration. The data was collected during a very nice clear spell (7 nights). There is an article on the object here with some images taken with a 1,5m professional instrument. I collected over 24 hours of data to compose this 2 pane mosaic. The data was stretched very harshly to reveal the faint details and had to be inverted to pull it from the background noise. Equipment: Homebuilt 10" f/3.8 Astrograph with Wynne corrector Sensor: ASI-1600MM-cool cmos Exposure: 288 x 5min = 24hrs Filter: Astrodon 5nm h-alpha Thanks for checking it out, Pieter

Great images! Really like the composition of the first one. Regards, Pieter

Florent, Great image! I really like the rework on the imaging train of the TeleVue, looks rock solid. I used the np101is some years ago and it is optically superb. Regards Pieter

Kaliska, Sounds familiar, I too seem to be having some halos around bright stars with my asi1600. The halos were not an issue with my previous camera (an old sbig st8300). I am using an Astrodon 5nm HA filter. Ever since I made the switch from the 8300 CCD to the asi, it started. There are not that huge, but quite annoying. I read somewhere it has to do with the cover or sensor glass in front of the CMOS that is not AR coated, but I cannot recollect all the details. Pieter

Maurice, looks fantastic. Always great to see new objects like this (and so nicely executed). You have captured such intricate details in the nebulosity and those razorsharp diffraction spikes are icing on the cake! Pieter

Harry, I am using the automatic mount flip with SGP and PHD. This is how I have it set up (apologies for the bad image quality). You cannot reverse the guiding direction in both the Mesu setup and PHD after a mount flip, because 2x reverse is nothing at all... Regards, Pieter

Looks amazing, such an interesting area. Well done! Pieter

Looks great, well done! Cygnus is such a great constellation. Pieter