But (whether the 60Da has video or not), why would you want to? Don't planets and stars move really really slowly? What information can you obtain from 1920x1080 25fps that you can't get from 5184x3456 5fps?The astronomical objects may be still, but the atmosphere is not. At high resolutions atmospheric effects are very noticeable and dynamic. By shooting hundreds or thousands of frames you can pick the ones that, quite randomly, are sharper than average, and by stacking only those you can get a sharper end-image than if you used a single longer exposure. In this way, amateurs today can produce images of the planets that rival or even outperform professional planetary images from only a few decades ago. The higher the fps (or rather, the shorter the exposure), the higher the likelihood that you will catch the atmosphere during a particularly still moment.
July 25, 2014, 02:51:44 AM
Topic: Canon Announces EOS 60Da for Astrophotography (Read 14267 times)
epsiloneri
- 7D
-
- Posts: 354
-
Logged
epsiloneri
- 7D
-
- Posts: 354
-
Though it once again returns me to my gripe that I really wish Canon would put out a monochrome body...I agree, that would be ideal (one usually needs different exposure times for the different narrow-band filters anyway). In addition to astrophotographers, I bet there would be a market among the more artistic photographers who wouldn't mind going back to b/w, and also surveillance etc where they need the best sensitivities. With the colour sensors we are essentially throwing away two thirds of the photons.
Logged
whwang
- Guest
May I ask where did Canon say the camera can only be used for H alpha?
You won't get L, but you do get RGB.
You won't get UV, but you do get H alpha, SII, OIII, as long as you put the filters in front of the camera.
You won't get L, but you do get RGB.
You won't get UV, but you do get H alpha, SII, OIII, as long as you put the filters in front of the camera.
I don't think you're understanding the "built in filter" and what it does. Actually, ALL dSLRs have an IR filter to produce "normal" looking skin tones. Without an IR filter, you would get very strange looking photos of people (and many subjects for that matter). Based on my interpretation of the 60DA, it appears as if some type of IR filter still exists, it just has been severely weakened.
I probably should have worded it better. I was comparing the described cut filter to a modified DSLR with a piece of optical glass in place of the filter. If you look through any telescope catalog there are a wide range of filters designed look at different things, and with a clear internal filter you can switch between them. With this body you are stuck with a hydrogen alpha... so no 0III, no UV, no LRGB, no hydrogen beta.. etc.
So for such a niche product it strikes me as very limited. Though as you point out, it keeps its warranty which is nice.
Still, what I would really like to see is someone like Canon produce a body that can compete with Orion's StarShoot... something that can work unteathered and have better resolution would be really sweet.
Logged
Neeneko
- Guest
I agree, that would be ideal (one usually needs different exposure times for the different narrow-band filters anyway). In addition to astrophotographers, I bet there would be a market among the more artistic photographers who wouldn't mind going back to b/w, and also surveillance etc where they need the best sensitivities. With the colour sensors we are essentially throwing away two thirds of the photons.
The conventional wisdom right now is that there is no market for B&W, and that colour images converted to B&W are 'good enough', though yes, there are quite a few people interested in using them for regular photography too. Every time it comes up in a forum there is clamoring for 'sell this at a sane price and I would buy one!'.
It has created a serious self fulfilling prophecy since the only B&W cameras on the market right now are expensive digital backs by MegaVision, AWT, and PhaseOne... MegaVision and AWT because they make scientific cameras and PhaseOne because they listened to people wanting an 'artistic B&W camera'.. though at 40k it makes a poor market tester.
Apparently Leica is planning on releasing a B&W version of the M10, which might give people SOME marketing data.. but their cameras tend to be overpriced/underfeatured status symbols so they make poor examples of what a larger community would actually buy.. not that much better then the digital backs and machine vision ones actually.
Of course there is always Maxmax's converted monochrome Canon cameras, but you are stuck with 500D/550D as your only options there... and of course no Canon repair shop will touch them.
Logged
Lee Jay
- 5D Mark III
- Posts: 649
-
I've found from my dabbling that high-ISO really isn't that useful. It's more about a stable, star-tracking base (Astrotrac in my case) and a medium-to-low ISO with long exposures.
A good resource for you:
http://www.samirkharusi.net/sub-exposures.html
Logged
Lee Jay
- 5D Mark III
- Posts: 649
-
Now, Canon should recommend a telescope for novices to use...
I'm sure Canon can recommend the 800/5.6 as a small, short-focal-length refractor.
Logged
canon rumors FORUM
Lee Jay
- 5D Mark III
- Posts: 649
-
For folks asking about "why video", here's why. One frame on the right, over a thousand stacked on the left.
Logged
kdsand
- Canon 70D
-
- Posts: 269
- Newt II a human stampede
-
Now, Canon should recommend a telescope for novices to use...
I'm sure Canon can recommend the 800/5.6 as a small, short-focal-length refractor.
I'll snatch one up!
Logged
60D, t2i, Magic Lantern, Manfrotto, Joby, Domke, SanDisk and excetera excetera