DSLR used for astrophotography???
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Re: DSLR used for astrophotography???
Were you down a well when you took that? Whats with all the vigenetting around the corners?
It looks out of focus, and some movement perhaps. That was shot at night? Neighbors have bright lights on?
It looks out of focus, and some movement perhaps. That was shot at night? Neighbors have bright lights on?
Tom
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Re: DSLR used for astrophotography???
I recommend not going over 10 seconds because the stars will look like trails due to the earth’s rotation if you go longer. I also recommend driving very far from any major cities, the photo I took was probably 100 miles from any large city. I also recommend shooting before moonrise or after moonset, as the moon will cause significant skyglow (i check these times using google). focus can be very tricky- if your camera has a live preview you’ll want to zoom into it, look at a star and manually adjust the focus ring till it turns into a point (you’ll want to be in manual focus mode). hope it helps.
Last edited by metastable on Fri Jan 10, 2020 4:59 pm, edited 1 time in total.
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Re: DSLR used for astrophotography???
also raw processing is key for a good result... i posted the settings i used in an earlier post, here is the “in camera” vs “processed” look...
metastable wrote: ↑Sat Dec 28, 2019 10:39 am
shooting in raw brings out a lot of detail:
same image “in camera”:
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Re: DSLR used for astrophotography???
UlteriorModem wrote: ↑Fri Jan 10, 2020 4:43 pm Were you down a well when you took that? Whats with all the vigenetting around the corners?
It looks out of focus, and some movement perhaps. That was shot at night? Neighbors have bright lights on?
In my driveway, shooting up between oak trees. Near full moon, nearby Street lamp.
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Re: DSLR used for astrophotography???
metastable wrote: ↑Fri Jan 10, 2020 4:50 pm also raw processing is key for a good result... i posted the settings i used in an earlier post, here is the “in camera” vs “processed” look...
metastable wrote: ↑Sat Dec 28, 2019 10:39 am
shooting in raw brings out a lot of detail:
same image “in camera”:
Is this just one photo or stacked?
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Re: DSLR used for astrophotography???
Regarding Nikon DSLR 's
How important is the sensor size: IE DX or FX and why?
How important is the sensor size: IE DX or FX and why?
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Re: DSLR used for astrophotography???
based on my current understanding of camera bodies, for astrophotography the low noise dynamic range of the sensor is the most important factor (allowing you to bump up the ISO/sensitivity without adding too much noise).
when it came first came out, the nikon d800 I use had by far the best low noise dynamic range of anydslr , and a very respectable 36 megapixels. the current version (nikon d850) will set you back $3000 and has 45 megapixels.
https://www.nikonusa.com/en/nikon-produ ... /d850.html
but recently sony has been making inroads into the digital camera market with their mirrorless bodies...
...so if you have $2400 to spend on body alone, my understanding is this one (Sony α7S II) has the best dynamic range that's available right now, but the tradeoff is it has "only" 12megapixels...
https://www.sony.com/electronics/interc ... /ilce-7sm2
if resolution is what you're after this one (Sony α7R IV) will give you 61 megapixels for $3500...
https://www.sony.com/electronics/interc ... /ilce-7rm4
when it came first came out, the nikon d800 I use had by far the best low noise dynamic range of any
https://www.nikonusa.com/en/nikon-produ ... /d850.html
but recently sony has been making inroads into the digital camera market with their mirrorless bodies...
...so if you have $2400 to spend on body alone, my understanding is this one (Sony α7S II) has the best dynamic range that's available right now, but the tradeoff is it has "only" 12megapixels...
https://www.sony.com/electronics/interc ... /ilce-7sm2
if resolution is what you're after this one (Sony α7R IV) will give you 61 megapixels for $3500...
https://www.sony.com/electronics/interc ... /ilce-7rm4
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Re: DSLR used for astrophotography???
this video has a pretty good demonstration of the sensitivity prowess of the Sony α7S II:
and this one, filmed entirely in moonlight, apparently:
and this one, filmed entirely in moonlight, apparently:
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Re: DSLR used for astrophotography???
Hi,
Yes it is significantly out of focus, and you have a hair or string of dust on the AA filter in front of the sensor.
Old cameras like this usually don't have live view referred to in another post.
You will need to focus by trial and error inspecting the previews at magnification to determine correct focus.
Joe
Yes it is significantly out of focus, and you have a hair or string of dust on the AA filter in front of the sensor.
Old cameras like this usually don't have live view referred to in another post.
You will need to focus by trial and error inspecting the previews at magnification to determine correct focus.
Joe
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Re: DSLR used for astrophotography???
that's a very bright image, i can see about 5 diffraction circles /airy disc , looks like you're out of focus by a mile or km for us metric users.
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Re: DSLR used for astrophotography???
Thanks - got better I think with these..... Keep in mind - no live view - only 6mpOzEclipse wrote: ↑Fri Jan 10, 2020 11:06 pm Hi,
Yes it is significantly out of focus, and you have a hair or string of dust on the AA filter in front of the sensor.
Old cameras like this usually don't have live view referred to in another post.
You will need to focus by trial and error inspecting the previews at magnification to determine correct focus.
Joe
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Re: DSLR used for astrophotography???
Yes much better but still not focused.lsintampa wrote: ↑Sun Jan 12, 2020 3:42 amThanks - got better I think with these..... Keep in mind - no live view - only 6mpOzEclipse wrote: ↑Fri Jan 10, 2020 11:06 pm Hi,
Yes it is significantly out of focus, and you have a hair or string of dust on the AA filter in front of the sensor.
Old cameras like this usually don't have live view referred to in another post.
You will need to focus by trial and error inspecting the previews at magnification to determine correct focus.
JoeDSLr - and just a start for me..... just trying to see if this is worth chasing - the D50 may not be the best camera for what I'm trying to do - but as I originally stated - for me this is a proof of concept exercise....
DSC_0035.jpg
DSC_0034.jpg
You just have to focus by trial and error. Push the ISO up, the
Joe
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Re: DSLR used for astrophotography???
It would be great if you could take and view pictures from a laptop, to catch focus problems. Unfortunately most windows applications do not seem to support the D50. I had similar problems with my D70s and finally ended up using gphoto2 (free) on Linux. But you need to be familiar with Linux and have a Linux laptop or a raspberry pi .
http://www.gphoto.org/proj/libgphoto2/support.php
http://www.gphoto.org/proj/libgphoto2/support.php
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Re: DSLR used for astrophotography???
I started my journey in astrophotography with a nikon d60 about 5 years ago and now i remember how frustrating the thing was to focus on stars without live view, there's very little you can do with the viewfinder to get critical focus on a small view, essentially you have to take an image then preview the image ,zoom in on the previewed image have a look at the stars and then adjust the focuser a tiny bit and repeat until the stars are small and tight.
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mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
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Re: DSLR used for astrophotography???
A lot of these newer cameras are improving elsewhere in their designs , like image 5 axis image stabilization which is great and could aid in longer exposures for astrophotography without tracking,faster autofocus for sports/bird photography ectt. . but for a dedicated astro camera i think top of the line is a bit of a waste $$ for just astrophotography due to price/performance,they seem to excel in single image nightscape but There's still plenty of cheapermetastable wrote: ↑Fri Jan 10, 2020 10:00 pm based on my current understanding of camera bodies, for astrophotography the low noise dynamic range of the sensor is the most important factor (allowing you to bump up the ISO/sensitivity without adding too much noise).
when it came first came out, the nikon d800 I use had by far the best low noise dynamic range of any dslr, and a very respectable 36 megapixels. the current version (nikon d850) will set you back $3000 and has 45 megapixels.
https://www.nikonusa.com/en/nikon-produ ... /d850.html
but recently sony has been making inroads into the digital camera market with their mirrorless bodies...
...so if you have $2400 to spend on body alone, my understanding is this one (Sony α7S II) has the best dynamic range that's available right now, but the tradeoff is it has "only" 12megapixels...
https://www.sony.com/electronics/interc ... /ilce-7sm2
if resolution is what you're after this one (Sony α7R IV) will give you 61 megapixels for $3500...
https://www.sony.com/electronics/interc ... /ilce-7rm4
dedicated Astronomy cameras are slowing catching up, zwo is starting to introduced full frame 62mp 16 bit 80% q.e cooled cameras at similar price of a modern new gen
scopes :gso/bintel f4 12"truss tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .
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Re: DSLR used for astrophotography???
ARock wrote: ↑Sun Jan 12, 2020 5:07 am It would be great if you could take and view pictures from a laptop, to catch focus problems. Unfortunately most windows applications do not seem to support the D50. I had similar problems with my D70s and finally ended up using gphoto2 (free) on Linux. But you need to be familiar with Linux and have a Linux laptop or a raspberry pi.
Same with my Sony Alpha A350. So I bought a Canon 600D from Ebay for £180. Second hand but a good price for what it is and it has the capability of connecting to a pc for accurate focussing (with a Bahtinov mask) and ease of image capture control.
Regards
Graeme
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Re: DSLR used for astrophotography???
lsintampa,
I could be wrong, but without live view, it will be nearly impossible to focus accurately. You can’t zoom in to use a batinov mask. Even if DigicamControl supports the camera, without the lv camera function, you still have the focus issue.
When shooting stars, “close” focus isn’t good enough.
Used dlsr’s that work well for astro ave available for very low prices on ebay. I bought my Nikon D5300 for $250 on ebay with less than 2k shutter clicks. I have seen Canon t3i’s for less than $200.
Just a thought.
Jim
I could be wrong, but without live view, it will be nearly impossible to focus accurately. You can’t zoom in to use a batinov mask. Even if DigicamControl supports the camera, without the lv camera function, you still have the focus issue.
When shooting stars, “close” focus isn’t good enough.
Used dlsr’s that work well for astro ave available for very low prices on ebay. I bought my Nikon D5300 for $250 on ebay with less than 2k shutter clicks. I have seen Canon t3i’s for less than $200.
Just a thought.
Jim
Jim
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Re: DSLR used for astrophotography???
It is possible to achieve acceptable focus from your DSLR lens set at 20mm but it ain't easy. You definitely need a Bahtinov mask (they're cheap at that size) plus live view just wasn't good enough to tell if the lens was in focus or not. I had to hook up my laptop to use its screen to see a big enough image to judge how well I was focused. I had to take a series of nearly 50 test images to gain as good a focus as the lens would allow, that took nearly 45 minutes. I swear that the increment I needed to move the focus ring felt like .5mm which makes it incredibly easy to go right past the focus point every time. I was also at 6500' and at around 20°F which made it even more difficult.
Anyway, use a mask and be patient, eventually, you'll get a focused image.
Cheers,
JT
Anyway, use a mask and be patient, eventually, you'll get a focused image.
Cheers,
JT
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∞ EPs: ES 2": 21mm 100° & 30mm 82° Pentax XW: 7, 10, 14, & 20mm 70°
Searching the skies since 1966. "I never met a scope I didn't want to keep."
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
∞ Mounts: iOptron CEM70AG, SW EQ6R, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
∞ Cameras: #1: ZWO ASI294MC Pro #2: 662MC #3: 120MC, Canon T3i, Orion SSAG, WYZE Cam3
∞ Binos: 10X50,11X70,15X70, 25X100 ∞ AP Gear: ZWO EAF and mini EFW and the Optolong L-eXteme filter
∞ EPs: ES 2": 21mm 100° & 30mm 82° Pentax XW: 7, 10, 14, & 20mm 70°
Searching the skies since 1966. "I never met a scope I didn't want to keep."
- metastable
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TSS Photo of the Day
Re: DSLR used for astrophotography???
This is a comparison from my most recent astrophotography excursion (shot near turntable bay at lake shasta in northern california, 1-6-20 3:30am PST) of my first shot (with the lens focus turned all the way to "infinity") compared to the next shot (after I zoomed into the live preview while adjusting the focus) on a nikon d800 with a nikon 14-24mm lens @ 14mm shot in raw, 10sec, 2.8f, 2000 iso, w/ light room settings Temp: 4637k, Tint: +2, Exposure: -0.97, Contrast: +87, Highlights: -100, Shadows: +100, Whites:+73, Blacks: +100, Clarity: +22, Dehaze: -1, Vibrance: -61, Saturation: -40:
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