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Forum: Post Your Photos! 2 Days Ago  
Night Orion nebulae wide field with astrotracer
Posted By aitrus3
Replies: 9
Views: 278
Astrobackyard says it's one of his best purchases.
Forum: Post Your Photos! 3 Days Ago  
Macro SNowflake #009
Posted By aitrus3
Replies: 8
Views: 162
Thanks!
I strive to move in an onward and upward direction.
Forum: Post Your Photos! 4 Days Ago  
Night Orion nebulae wide field with astrotracer
Posted By aitrus3
Replies: 9
Views: 278
nice work! well done! that lens is looking tempting!
Forum: Post Your Photos! 4 Days Ago  
Nature Crowded approach - I need a free gate!
Posted By aitrus3
Replies: 7
Views: 164
awesome capture!
Forum: Post Your Photos! 4 Days Ago  
Macro SNowflake #009
Posted By aitrus3
Replies: 8
Views: 162
Haha, only way to do it :) I think it was around -20C that morning.

---------- Post added 01-19-2020 at 01:43 PM ----------



Yeah so glad I went out for a quick look that morning. Just wish I had had more time to get a few more, but I had a doctors appointment to get to, so one it was.
Forum: Post Your Photos! 4 Days Ago  
Macro SNowflake #009
Posted By aitrus3
Replies: 8
Views: 162
Here is snowflake number 009. I think it's a stellar dendrite early on it's formation before the branches had a lot of time to grow. My favourite shot to date.

Snowflake009NonPSR by Greg Murray, on Flickr
Forum: Post Your Photos! 6 Days Ago  
Macro Snowflake 008 Pixel Shift
Posted By aitrus3
Replies: 2
Views: 258
Thanks MikeNArk
Glad you like it :)
Forum: Post Your Photos! 6 Days Ago  
Macro Snowflake 008 Pixel Shift
Posted By aitrus3
Replies: 2
Views: 258
Here is number 008. I did end up taking another 009, but I am saving that one to publish later; only a select few have seen it. Wanting to enter it into an upcoming competition. Originally I wanted to enter this one because it was the best one I got so far this year, but not any longer.

Snowflake008 by Greg Murray, on Flickr
Forum: Post Your Photos! 6 Days Ago  
Macro Snowflake 007
Posted By aitrus3
Replies: 7
Views: 163
Thanks for that! Always interested in anything science! I am fascinated on how they form! While these ones are very photogenic, I am also very curious as to what causes them to become rods, spheres, frosted etc. in any one session, it's fascinating to see just how much the type of snow varies.

---------- Post added 01-17-2020 at 05:38 AM ----------


I will be sure to check it out!
Forum: Post Your Photos! 01-16-2020, 04:23 AM  
Macro Snowflake 007
Posted By aitrus3
Replies: 7
Views: 163
Pixel Shifted, cropped in snowflake number 007. Number 8 will come tomorrow and probably be the last one for a while.

Snowflake007 by Greg Murray, on Flickr
Forum: Post Your Photos! 01-15-2020, 01:29 PM  
Black & White Lost in Thought
Posted By aitrus3
Replies: 10
Views: 243
Love it brewmaster! Well done!
Forum: Post Your Photos! 01-15-2020, 01:25 PM  
Black & White Hallway being
Posted By aitrus3
Replies: 8
Views: 218
Fun but creepy!
Forum: Post Your Photos! 01-15-2020, 01:20 PM  
Macro Snowflake 006
Posted By aitrus3
Replies: 2
Views: 98
I've started numbering these to keep track of them. This is number 006. So far the predicted snow for today hasn't materialized and I haven't yet got any more.
And I see we've quieted back down since the contests are over. haha. I still love this forum so will continue to use it, I just don't participate much in the rumours.

Snowflake006 by Greg Murray, on Flickr
Forum: Post Your Photos! 01-14-2020, 08:35 PM  
Macro More snow
Posted By aitrus3
Replies: 2
Views: 113
Thanks Torashi!
It may have been 'steaming' haha! This was the first session where i had problems with the flakes melting...
Forum: Post Your Photos! 01-14-2020, 09:40 AM  
Misc Another test of optics
Posted By aitrus3
Replies: 3
Views: 165
Finally got to it. Shot of the moon was with the 18mm lens + 72mm extension tubes attached right to camera.

82087155_10162720167880655_7892027974340313088_o by Greg Murray, on Flickr
Forum: Post Your Photos! 01-14-2020, 09:08 AM  
Macro More snow
Posted By aitrus3
Replies: 2
Views: 113
I'll be spamming with snowflakes for a while I think. (I hope!) I'll stick to one a day though.
This is snowflake 003, the last one I shared was 001. I've started numbering them just to keep them organized.
Snowflake003 by Greg Murray, on Flickr
Forum: Post Your Photos! 01-11-2020, 09:02 AM  
Macro Jewel of Winter: Snow Flake
Posted By aitrus3
Replies: 6
Views: 147
I've lived through that too. Hoping the situation turns around for you guys! Our summers can be real bad for wildfires so I know how it feels.

---------- Post added 01-11-2020 at 08:03 AM ----------


Thanks Todd,
When I caught this one on the glove, the first words out of my mouth were "there's the gem!" It's too bad it was a little too warm, it was even better than this and because I had to work so fast, it's not as sharp as I'd like.
Forum: Post Your Photos! 01-10-2020, 08:35 PM  
Macro Jewel of Winter: Snow Flake
Posted By aitrus3
Replies: 6
Views: 147
Thanks TT. I was worried because it was melting as I was photographing it. Next week forecast has -14C with snow, so hopefully the melting issue is solved with that.
Forum: Post Your Photos! 01-10-2020, 07:32 PM  
Macro Jewel of Winter: Snow Flake
Posted By aitrus3
Replies: 6
Views: 147
Jewel of winter.
Got some snowflakes in today. It was a challenge as it was still slightly warm, but hoping next week solves that issue.
My favourite from today.

Snowflake001 by Greg Murray, on Flickr
Forum: Post Your Photos! 01-10-2020, 08:59 AM  
Night Another moon shot
Posted By aitrus3
Replies: 11
Views: 166
Thanks :) The colours come from different minerals and ages. Brownish/orange in the mare are much older low titanium basalts around 4 billion years old (i think it's between 4 and 4.2) and the bluer/black mare are basalts high in titanium that are around half the age as the other basalts. As far as I can tell, that data comes from Chinas Chang'e missions.

---------- Post added 01-10-2020 at 08:01 AM ----------



Yes, a lot of moon shots out there. While most are ok, few attempt to get this kind of detail. If you want a shot of the moon that stands out, you really need to try something special.
Forum: Post Your Photos! 01-09-2020, 11:37 AM  
Night Another moon shot
Posted By aitrus3
Replies: 11
Views: 166
After three years since my last moon shot, I finally was successful repeating the attempt last night.
Around 210 frames developed in LR6 + exported, pre-processed in PiPP, stacked in LynkEOS with deconvolution added, rough processing done in Affinity Photo, minor final touches back in LR6
ISO 100, 1/100s @ 836mm for each frame.
Missed white balance on versions 1 and 2. Got it right -with fewer frames- in version 3, processed all frames with proper white balance for this final version 4.
Took it after playing with my homemade eyepieces last night.

Jan2020Moon4AP by Greg Murray, on Flickr
Forum: Post Your Photos! 01-08-2020, 07:46 PM  
Misc Another test of optics
Posted By aitrus3
Replies: 3
Views: 165
Will do. Probably get to that tomorrow. It surprised me tonight by clearing off, so I got to test my eyepieces! So beautiful and sharp. I tried a shot with my camera attached to the 18mm setup, but as suspected, my glue job wasn't strong enough and the glue cracked. If I want to look at that more seriously I need to make this adapter out of one piece of aluminum.
Forum: Post Your Photos! 01-08-2020, 02:56 PM  
Landscape Neskonlith Lake Log
Posted By aitrus3
Replies: 13
Views: 623
Ha! Thanks!
It's my favourite spot. Right next to that picture of the rocks with the lake in behind.
Forum: Post Your Photos! 01-08-2020, 02:40 PM  
Misc Another test of optics
Posted By aitrus3
Replies: 3
Views: 165
Since my last post about what extension tubes and a teleconverter behind a 50mm macro can accomplish was so popular, here's another test I've done on the opposite end of the spectrum: telescope photography.

I recently joined a group on Facebook regarding building your own telescope eye pieces from broken or obsolete binoculars. I got a brain wave and though to myself "Why can't I build one from pentax lenses in such a way that I can still use the lens?"
So I set off and built myself a 2" eyepiece adapter that can turn any pentax lens (as long as it has a filter ring to go from x filter size to 52mm) into a 2" very bright, sharp and great eye relief eye piece. So far my favourite is the old pentax 50mm f2 (or f1.7 is even better) lens. Not much to offer int he way of magnification, it probably has the same field of view as my camera attached to the telescope directly, but it's SO VERY BRIGHT. I can't wait to try it on some bigger targets like orion and andromeda. My other favourite is the Pentax 18-55mm @18mm simply because it offers really nice magnification.
When Igot it built, I had the brilliant idea to try attaching my camera to the lens that was inserted into the telescope as an eye piece. I tried the 18-55 @18mm and while I got it to focus, the image circle was extremely tiny; I had the lens focused to infinity for that test.
Then, being on 50mg of prednisone, I couldn't sleep last night and was running a bunch of thought experiments in bed. I thought "well what if I focused the lens to it's nearest point? that should technically enlarge the circle?" While thinking about it my thought went to extension tubes and how they work. Technically at 18mm you could only get away with 12mm of extension tubes because under normal photography your subject would be near touching the lens surface for focus to be achieved and any more than 18mm, your focus point is actually behind the front element inside the lens. But, we're not dealing with normal photography where the subject is a solid object. In this case, the subject is a beam of light focused by the telescope and, by extension, could very well indeed become focused inside the 18-55mm lens. So that should, in effect, push my focal point even closer and increase that circumference even more. And not to be outdone there, I thought about my macro lens and how they behave differently than normal lenses and wondered what the results wold be if i attached my camera to my 50mm macro with and without extension tubes and took a shot.
I got up early this morning and completed the tests. here are the results. the images are all labelled as to the combination.
For reference, when I say "max mag 1:1 life-size without telescope" I am referring to the max mag I would get with the macro lens in that configuration without the telescope attached. I have no idea how to actually calculate what kinds of magnifications I am getting with it all assembled in the telescope without actually shooting something of a known scale.
I am very curious now what the results would be with a wider focal length macro lens. The wider you go in telescope eye pieces, the stronger the magnifying power. Hence why 50mm offers little magnification and 18mm offers the most.

Please, unless I know you personally and know that you're a great physicist, don't try and explain the physics of this to me. This is a fun post, and I don't really want an explanation that simply doesn't line up with the physical tests I've done.


GREG6663 by Greg Murray, on Flickr
Forum: Photo Critique 01-08-2020, 02:15 PM  
Abstract Yes, it's a standard tourist shot, but I'd like a critique anyway
Posted By aitrus3
Replies: 31
Views: 920
It's your image, so you do need to do what you feel is right. However, with the wider crops it simply just has too much going on and no clear subject and doesn't really do the story justice. It's like forming a sentence with all the right words in all the wrong order; content the there is it's not but right the order in. (the content is there but it's not in the right order). That's all some of us are trying to say.
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