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Montana

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Posts posted by Montana

    SGL 2021 Analemma Challenge Special!

    in SGL Challenges and Competitions

    Posted · Edited by Montana

    I'm not sure if this counts but I did an analemma from my back garden but it took me years to complete due to cloudy weather. You have to be absolutely on the second accurate and if the Sun doesn't shine you have to wait for another year, it takes ages! I took this over a period of mainly 2016 and then 2017,18 and 19 to fill the gaps. I used the location of my image as the backdrop, I didn't know I could go elsewhere to super-impose it. The image is therefore the genuine view.

    here are the links, they were all taken at 11:00 GMT

    Analemma 2019-12-21 annotated version 1 2019-12-21 Analemma 2016-2019 version 2 2019-12-21 Analemma 2016-2019 version 3

    Alexandra

     

     

     

    • Like 11

    Problems with Deep Sky stacker

    in Discussions - Software

    Posted

    Thanks, that works.

    That makes no sense? I check all programs as run as administrator as default. For Firecapture if you don't, none of the settings are saved, Autostakkert also won't run unless run as administrator. So for this program it won't work if you are running as administrator. I'm lost.

    But, thanks a million, it works!!

    Alexandra

    Problems with Deep Sky stacker

    in Discussions - Software

    Posted

    I was wondering if anyone could help me solve this. I have used Deep Sky stacker for many years with no problems. Recently my computer died after a Dell Bios update. Dell replaced the motherboard and Itel graphics card but as a result everything was wiped clean. I have reinstalled all my programs so far but Deep Sky Stacker refuses to work.

    I installed the latest version 4.2.6. Set as run as administrator. The program opens fine, I load all my images in, check all, register checked images. When I press go the program immediately closes.

    I checked my Bitdefender and the permissions are set to allow it to run. I have reinstalled a couple of times and it still instantly shuts down when you press go.

    Have I missed something, I don't know where to go from here.

    Many thanks for your help

    Alexandra

    Where are the calcium filaments hiding?

    in Imaging - Solar

    Posted

    The tighter your bandwidth in the K line the more the filaments will stand out in CaK. If you look at spectroheliograph images in CaK, the filaments stand out as distinct black lines similar to Halpha. They are lines of neutral magnetic field. We can usually never see them as the Lunt and Coronado CaK are not narrow enough. You are obviously getting (but not quite) towards the optimum narrow bandwidth. You should build a spectroheliograph :)

    Alexandra

    • Like 2

    Post your highest resolution captures here. PLEASE :)

    in Imaging - Solar

    Posted · Edited by Montana
    Has the forum changed?

    Apollo, you have the best CaK animations in the world :) It is great to see everyone's best ever, together. They don't come about every year but these are my best two

    Can't post :( BB code or html doesn't work. What has changed?

    https://live.staticflickr.com/65535/50326981643_249b849d06_b.jpg

    https://live.staticflickr.com/567/21901673958_5a6989e784_b.jpg

    BB code used to work and was so simple. I have tried every link from Flickr possible and nothing works anymore. Pity.

    How Rusted? please do share :)

    Alexandra

    • Like 1
    • Thanks 1

    Show us your Solarcan images

    in Imaging - Solar

    Posted

    First, well done on the Solarcan, it is always so exciting to break it open and see the paper with lines on.

    Second, don't angle the next one keep it straight. This is a camera obscura https://en.wikipedia.org/wiki/Camera_obscura

    Therefore, the image is produced upside down. So to raise the height of your solar tracks you need to maintain the can in a straight position but you must move the pin hole upwards.

    I tried this this year and managed to get more tracks but still not high enough. I made my hole exactly half way between the middle and the top. I tried to get it higher but couldn't get the pin through, I think maybe I hit a fixture inside. I need to try again and get higher. Try to understand the wiki post and you will understand what I mean. I also got the star reflections with mine using the middle provided pin hole so I think it is something to with the set up. I didn't get it this year with my own pinhole.

    Middle pin hole

    49272282138_be47a6d94c_b.jpg2019-12-24 Solarcan by Alexandra Hart, on Flickr

    Pin hole moved higher up can

    50758820983_df5bd1ba10_b.jpgSolarcan 2020 negative by Alexandra Hart, on Flickr

     

    Alexandra

    • Like 6
    • Thanks 2

    FLO Solarcan 2020

    in Imaging - Solar

    Posted

    My Solarcan finished on the 21st December and on Christmas day I cut it open. It was a little wet inside with 1ml of water but I think that was from all the storms we had in summer. I had to let the paper dry in a drawer for half an hour and then it scanned in OK.

    I am much happier with the position of the pin hole this year. Last year I used the standard in the middle, this year I added one half way between middle and the top (3/4 upwards) and this worked a lot better. I still think I could raise the hole higher.

    https://www.firstlightoptics.com/other-science-gadgets-models-toys/solarcan-ready-to-use-solargraphy-camera.html

    50758820983_df5bd1ba10_b.jpgSolarcan 2020 negative by Alexandra Hart, on Flickr

    Straight out of the can view

    50758822153_da767039da_b.jpgSolarcan 2020 original by Alexandra Hart, on Flickr

     

    This was the 2019 version with the standard middle pin hole

    49272282138_be47a6d94c_b.jpg2019-12-24 Solarcan by Alexandra Hart, on Flickr

     

    Alexandra

    • Like 12

    Longest exposure ever - eight and a half years

    in Imaging - Solar

    Posted

    I buy all mine from FLO Luke :) My next one is due off on Christmas eve. Like the above image all the summer trails are knocked off, so this year I experimented by not using the hole that comes with the can and I have placed another half way up the can to see if I get more of the summer trails. We shall see.......

    This was last years attempt which I was pleased with but disappointed with at the same time. I would be disappointed after 2 and half years too!

    49272282138_be47a6d94c_b.jpg2019-12-24 Solarcan by Alexandra Hart, on Flickr

    The can from FLO

    Alexandra

    • Like 2
    • Thanks 1

    Single vs Double Stack Image

    in Imaging - Solar

    Posted

    Luke, the reason for not seeing the proms in the single stack and seeing them in the double stack is because the dynamic range changes. The eyeball in single stack can see the proms more easily but the dynamic range is large and therefore bad for the camera. In double stack the whole image is darker but more even and therefore the dynamic range is closer together so the camera can see the surface and the proms together. 

    The Chameleon is excellent for the PST (better pixel size for resolution) but the Newton's rings are horrible! I'm getting there with the help of software for pattern suppression :) However the DMK41 still has better dynamic range even if the resolution is worse (and no NRs).

    Alexandra

    • Thanks 1
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