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ISO test

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test: shoot at stable aperture and speed, vary the ISO. Shoot in raw, see how much latitude I have properly exposed ISO 1000 under exposed - ISO 100 speed 1/500 under exposed ISO 100 over  ISO 5000 WAY over ISO 51200
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stacking ETC

in Photo shop Auto align is the basic tool here is a tutorial https://www.youtube.com/watch?v=zzVSm64zq44 (he gets into smart objects!) also has a post processing video - I should watch https://www.youtube.com/watch?v=6sBrQ6yAcNI also lok at this https://www.youtube.com/watch?v=kMN_rpSe7MQ
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The Photography Summary: 1) Stills about 1000 ISO about f/2.4 with new lens about 5 - 10 sec exposure White balance - about 4500 k to test - limits of ISO pushing-how many stops ± TEST+ Do same photo with 100 ISO and 1000 and 5000 and see where it gets you. Test - outdoors. Set at ISO 100 and fast shutter/ aperture, to seriously under expose. Then increase the ISO to 1000, 5000, and HI ISO. Next - overexposed. Set at ISO 100 and properly expose per the meter, then increase the ISO till ugly. LENS tests- do a white photo properly exposed to set the vignetting in LightRoom. and then a brick wall to calibrate the distortion. can I adjust brightness in camera to test exposure? to test - do photos with HI ISO setting. what happens to noise when you halve the number of pixels - should go down significantly. Test on pre-existing images Test vignetting today in the daylight Color noise? noise reduction  Test on pre-existing images 2) Time Lapse use still settings
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Random iceland notes from Andrew Marr: https://www.youtube.com/watch?v=m3SlpbI2TrY LOTS of links to sources. Really good International photography map of iceland. Highlights interesting tourist locations and good photographic sites. Buy online https://international-photographer.com/en/product/iceland-poster/ used 17-35 mm lens, 24 mm lens and tele. wide angle smooshes the mountains in the distance - not good. Took Polarizer. more gear (16:00) Pouches (think tank) look waterproof charger - power brick. 26,000 mA. (Anker) COULD I RECHARGE MY CAMERA WITH THIS? To recharge the Nikon batteries - recharging stations - What are they?? sandisk SSD  - he backed up to two disks. 2 Tb. Samsung T3 - Gnarbox can backup without computer.  ($254) - has internal memory of up to 246gB Osprey 5.40 -forty liter bag Lipo guard for battery storage 2) 10 things to know before visiting Iceland https://www.youtube.com/watch?v=PbW-VTrsikQ notes to self: 1) set up spreadsheet
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Time lapse notes 1)  https://www.youtube.com/watch?v=XZnaBHa2f18 They say if you do interval, you can download to any video editing software to combine. shoot manual. quality picture control (?) = flat minimum of 10 seconds of video. manual focus. try a test single exposure Interval timer mode: lock exposure, WB, Focus, No auto mode. You have to do a rough calculation of time 24 frames/second - 2 second video needs 48 images. Shoot a few extra frames. (might get tricky hen doing 6 second images.) 2) how to make a timelapse in lightroom https://www.youtube.com/watch?v=RpnFqQNgJnE Don't need third party apps Use slideshow module. took 1000 images in iceland import all photos into lightroom. put in their own collection. may need to change into a 16x9 format select all photos Cmd-A. Hit light switch next to sync button -turns on auto sync. Each change to a photo propagates to all photos crop to 16x9 click done, it propagates Can do lens correction and pro
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notes on youtubes: 1) Lenses I wish I had never bought. https://www.youtube.com/watch?v=Pgtat9ujhwY 24mm f1.4 sigma - the distortion too great for portraits. Image quality good, though. Misses focus at times. Sounds like it might be good for me. I may want this instead of the Rokinon. Samyang 24mm f3.5 - cheaper than above. "tilt shift" lens?? this is a shift lens. The manual focus is an issue 2) Reduce high-ISO grain.  https://www.youtube.com/watch?v=GmV4heJ75Zg&frags=pl%2Cwn shutter 20 seconds f/2.8 can't see anything until get too ISO 800 Loads RAW images into Photoshop. increasing exposure in PS results in SAME image as if you used the increased ISO. Lesson - you get nothing more by increasing ISO IF you have an ISO invariant sensor. Which is mine? He discusses more on  peterzelinka.com. Complete video on night photography there. Also backpack review fixing in photoshop. Use RAW. The ONLY way to reduce grain is to capture more light. Can incre
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Let's refocus My first goal is to guarantee I can get good images of the aurora. I am getting distracted by how to get good images of star fields with the Nikon. SO - Focus! What I  want is either/and 1) good still photos 2) good time lapse 3) good movies. None of these require stacking. (except maybe good still photos) However, I would prefer my stills not be so long as to destroy the linear detail in the auraorae. So - I need to concentrate and practice getting good still night photos. Then work on time lapse and movies. points along this path: 1) determine good exposure values for various times. Check these for image quality. I will have to vary the ISO, and there will be a point at which they become too noisy. 2) learn to do the focusing in the dark without fail. 3)test the various exposure values, put out comparison images for criticism. after this Move on to time lapse. Learn how to change into a movie that doesn't go so fast And then to movies. No
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