Before heading to my failures in astrophotography, I'd just like to list here my results certificate from Treierenberg Circuit, which was emailed to me on April 19th. I wouldn't call it a success, nor a complete failure, but I was hoping for more brilliants results than this actually.
A=Accepted, R=Rejected (for exhibition). Click to enlarge. |
Anyway, no gold medals this time, but I'm happy that my shot Anxiety got accepted. I can't post all images here but probably you can roll back to my previous posts where I posted some of these images (and I made a quick video as well for one of the posts).
AstroFails
As I've mentioned earlier, my trials with astrophotography from the yard at home were prone to fail mostly and I couldn't catch but a glimpse of some constellations or stars. My real target, though, is to shoot something exciting like a nebula or a galaxy.
In the course of learning, I had my hopes up for various reasons, as well as learning many other aspects that might be beneficial for the photographic vision and processing as a whole later on. Specifically, the power of RawTherapee! I still have my hopes high despite the failures that I've had already. I've read and still reading from time to time about the trials of many people in shooting high ISO and in the city bringing the space to life with their images, without even using a tracking mount which typical for a serious professional astrophogoraphy, Despite following their steps, I didn't come up with anything serious though and I guess it's all laid on my own problems with the location and gear.
A trial with 50mm lens on April 21st. Probably Leo constellation appears here. The black spots are probably passing clouds or just stacking artifacts. |
My trials in the beginning were always at 300mm with Hα filter to suppress the light pollution. However, reading more about the topic, I've realized that most professionals would shoot normal, without such a filter, even in untracked astrophotography like what I'm doing right here, and shoot Hα to collect more data in that region of the spectrum and merge it with the normal images. It's easy to be done digitally, complicated to be done in practice! However, I've shot with the filter and processed some images and some of them yielded some good results with Deep Sky Stacker (DSS). Seeing how things are hard with 300mm, I've decided to go all the way to the beginning; Shooting with 50mm, then 100mm and then maybe 200mm and 300mm. My trials are still going on while typing these words actually but I've stopped for some time to do other photography projects on the side!
This experience in shooting astrophotography, despite its failures, as I think, did teach a number of things and opened my eyes to another venue. I like to organize my thoughts in points here:
- Shooting with high ISO: I'm not afraid to crank the ISO to its highest point. Not only in astrophotography but it could be in other genres as well. A number of things had changed when it comes to dealing with such images and such noise.
- RawTherapee: It turns out, beside DSS, that this open source editor would be (and is) the best friend one can have away from Photoshop! The noise reduction algorithms and the capabilities of adding a dark frame and a flat frame to the algorithm of noise reduction and image correction makes it ideal. This is beside the "demosaicing" algorithms, of which two are dedicated to high ISO images. I'm thinking seriously of visiting some of the old images I've taken (specially those from 2015 from the Monodrama festival back then) and try to reduce the noise with RawTherapee. Some professionals, as I've read in some articles, make a point that it's bad that RawTherapee does not allow the addition of more than one dark frame to take the average for noise reduction (like DSS does) but I think this is something specific to DSS and the nature of astrophotography, and RawTherapee is a general editor of some sort and should not necessarily go on the same path as DSS. Another good point for RawTherapee is the ability to work with 32-bit images as well (HDRs), and in various algorithms as it seems (linear and rational).
- Ball Heads: I never imagined that my worst enemy in shooting would one day be my best friend in shooting! When I started my trials with astrophotography, I used a panning head; My preferred head to work with ease. I've neglected all the advice I've read about using ball heads in those online articles from professionals. I was wrong, completely. Ball heads in this situation IS the real and the only candidate for shooting the sky. Thinking about it, I might even consider integrating such a head in my usual workflow (but not in panorama making for sure of course).
- Focusing: Having a good focus to a completely dark sky with unseen stars (until the images are processed) is quite a struggle. I've been even taking test shots just to notice and see if there are any bright stars in the image and move the focusing ring accordingly. Reading articles online about this matter did not help much, and applying the principle of the hyperfocal distance is not achievable somewhat (specially when the f-number is quite low). Probably the most significant advice I've seen online is to focus at some light source or a subject which is around 100m away or so, and that is not possible to do in my case (I don't have such a space as I'm shooting at home).
- Locating: Currently, I've been using an app on my Huawei android phone called Sky Map, and probably this is the best I could find. The app is fine, but the problem is in matching the field of view on the phone with that of the lens (i.e. what does the lens see). The lens' field of view is a measurable angle (according to the sensor size), but on the app there is no scale for that. I tried to check for a better app but seems this is the best I could get so far.
- Pointing: With the problem of locating, comes the other problem of pointing in the right direction into the dark sky. A cumbersome method I've came up with is to hold my phone against the LCD of my camera (as if it is the LCD itself) and look at the map on the phone to know what stars are in view. This is not an accurate method of course but maybe a good approximation. Moving the camera cannot be done while holding the phone against the LCD, unless with some help (but I'm working alone here, as usual).
- Tracking: The method of "untracked astrophotography" depends on moving the camera manually and follow up the movement of the object in the sky. But the sky is dark already and I'm not sure how would I follow up an object that cannot be seen even on LCD when the shots are taken! For this, I depend on some visible clues like a glittering little star and check its movement before changing the orientation of the camera. However, maybe this star is not anywhere near my original aim in the sky!
- Gear: Not talking about a tracker mount (which is favorable actually), but a good lens would do wonders. In the images above, shot at 50mm and 100mm, all were actually taken with my Canon EF 50mm f/1.4 USM lens, with just the addition of a 2x teleconverter to reach 100mm (and adding another one to reach 200mm even). Teleconverters double the focal lengths AND the aperture. Thus, f/1.4 would naturally go up to f/2.8 (and surprisingly stops at this value even when adding another teleconverter). Most of the articles I've read online talk about Canon's 70-200mm lenses with f/2.8 and adding a teleconverter to that to reach 400mm to shoot nebulae and galaxies. Makes me really wonder whether my Sigma 70-300mm is any good to the task with its f/4 at 70mm and f/5.6 at 300mm (and adding a teleconverter would raise that up to f/11 at 600mm!). Baseline: f/4 is not good enough. But anyway, I'm willing to try my best still with what I have.
Those are, probably, the most dominant problems in my work with the sky so far. I'm willing to try and try again. For the time being, I'm just having a break to type this blog post and also to work on side projects (which, again, starts with chasing my gear around and locating lost items). I was hoping though to get some decent results for a galaxy or a nebula, and start typing an Arabic blog post about my experience with it. Guess this has to wait till I get concrete results. I am aiming also to take wide angle shots and try to catch the milky way in such light-polluted area, so I might leave the comfort of my home or try to reach the roof. We'll see about that.
Finale
Summer is arriving here and the weather is getting hotter and hotter. It's such a mess in my workplace right now, and such a mess in my brain right now. The idea of just resigning and leaving everything behind me really tickles my brain from time to time. I really need some kind of eternal rest, from useless routines and work, and people as well. Is that a result of not traveling for such a long time? Maybe. Not sure if I will travel this year though despite having some ideas already. The laws here, also, are getting up to some ridiculous degree, and around me I see many people and instances of people trying to survive in this turmoil of a thing that is supposed to be a homeland.
Meanwhile, I'm looking at my poetry writing and I feel sorry for myself for not being able to write down anything or do anything about it for months now. It feels if my soul, rather than my body, that is so tired deep inside. Tired of everything. Tired of even pinning a smile on my face wherever I go and keeping my cool temper. All that is blocking my way of expression, verbally, and in writing. All I'm wishing for right now is to have the mood and power to work with my camera as much as possible and trying to put my mind off the problems that hover around me…
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