The Official Shoot the Moon Thread

TeamSpeed wrote in post #19116546
Stacked 2x and 1.4x reduces the amount of light three stops. So yes you can try to compensate either by ISO or shutter speed from just the plain lens, you just have to decide which is least detrimental.

The advantage of using a mirrorless camera is shooting with 'lighting effects on'. The image in the viewfinder is exactly how the captured image will look and adjusting shutter speed for example immediately shows the scene getting brighter or dimmer in manual mode. Another advantage of the 61mp sensor on the Sony a7r4 is that in crop mode, the resolution is still 26mp. I have a button assigned to toggle APS-C mode on and off.

Gene - My Photo Gallery || My USS Oriskany website || My Flickr
Take nothing but photos - leave nothing but footprints - break nothing but silence - kill nothing but time.

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"Man only has 5 senses, and sometimes not even that, so if they define the world, the universe, the dimensions of existence, and spirituality with just these limited senses, their view of what-is and what-can-be is very myopic indeed and they are doomed, now and forever."

TeamSpeed wrote in post #19116620
One stop means you have to change one of the three factors of exposure (or partials of each):

1. You are doubling your ISO if you lose a stop, or halving it if you gain a stop.

2. You are halving your shutter speed if you lose a stop, or doubling it if you gain a stop.

3. You are going to open up your fstop (ex. f/4 to f/2.8) if you lose a stop, or going to close down your fstop (ex. f/4 to f/5.6) if you gain a stop.

Shooting the moon with TCs means you likely are going to run as open an aperture you can, so you can only really play with points 1 and 2. You either lower your shutter speed or raise your ISO (or a combination).

Summary:

If you lose a stop of light, you will raise your ISO, or lower your shutter speed, or open up your fstop, or some combination.

If you gain a stop of light, you will lower your ISO, raise your shutter speed, or close down your fstop, or some combination.

Thank you very much!

Charles
Canon EOS 90D * Canon EF-S 18-135mm f/3.5-5.6 IS USM* Flickr Account
Tokina AT-X Pro DX 11-20 f/2.8 * Sigma 17-70 f2.8-4 DC Macro OS * Sigma 150-600 f5-6.3 APO DG OS HSM Contemporary
Canon 18-55 IS Kit Lens * Canon 70-300 IS USM * Canon 50mm f1.8 * Canon 580EX II

TeamSpeed wrote in post #19116753
Yes you may now end up with a 26mpx result but that result had now "drilled" into the image expanding the view of noise, motion, etc. This is why it would be better, if possible, to get as large an optical result onto that sensor first, then crop. As long as the TC and lens results are good, you can clean up noise, get better detail, etc and you can then resample down too if it is still too large.

Yep, that's why I've always used either my 1.4 or 2x extenders on my 200-600mm lens for my Moon shots so far. The Sony extenders don't stack so it's one or the other at a time.

Gene - My Photo Gallery || My USS Oriskany website || My Flickr
Take nothing but photos - leave nothing but footprints - break nothing but silence - kill nothing but time.

Past Equipment | My Personal Gallery My Business Gallery
"Man only has 5 senses, and sometimes not even that, so if they define the world, the universe, the dimensions of existence, and spirituality with just these limited senses, their view of what-is and what-can-be is very myopic indeed and they are doomed, now and forever."

TeamSpeed wrote in post #19116805
It's annoying that the newest Canon TC don't stack either. The mk ii did however.

Sounds like they went backa**wards in design....

Charles
Canon EOS 90D * Canon EF-S 18-135mm f/3.5-5.6 IS USM* Flickr Account
Tokina AT-X Pro DX 11-20 f/2.8 * Sigma 17-70 f2.8-4 DC Macro OS * Sigma 150-600 f5-6.3 APO DG OS HSM Contemporary
Canon 18-55 IS Kit Lens * Canon 70-300 IS USM * Canon 50mm f1.8 * Canon 580EX II

Inspeqtor wrote in post #19116952
Sounds like they went backa**wards in design....

well the IQ is much better and AF is improved from camera to lens through the TC, so not really. Most folks aren't stacking TCs to lose 3 stops of light either. One of these two is a higher priority than the other.

Past Equipment | My Personal Gallery My Business Gallery
"Man only has 5 senses, and sometimes not even that, so if they define the world, the universe, the dimensions of existence, and spirituality with just these limited senses, their view of what-is and what-can-be is very myopic indeed and they are doomed, now and forever."

TeamSpeed wrote in post #19116955
well the IQ is much better and AF is improved from camera to lens through the TC, so not really. Most folks aren't stacking TCs to lose 3 stops of light either. One of these two is a higher priority than the other.

Thank you. You just unknowingly answered a question I did have that now I do not have to ask!

Charles
Canon EOS 90D * Canon EF-S 18-135mm f/3.5-5.6 IS USM* Flickr Account
Tokina AT-X Pro DX 11-20 f/2.8 * Sigma 17-70 f2.8-4 DC Macro OS * Sigma 150-600 f5-6.3 APO DG OS HSM Contemporary
Canon 18-55 IS Kit Lens * Canon 70-300 IS USM * Canon 50mm f1.8 * Canon 580EX II

Tonight, crop from a crop body...

Canon EOS M50 • 1/400 • f/11 • ISO 400

Image hosted by forum (1061150) © TeamSpeed [SHARE LINK]
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Past Equipment | My Personal Gallery My Business Gallery
"Man only has 5 senses, and sometimes not even that, so if they define the world, the universe, the dimensions of existence, and spirituality with just these limited senses, their view of what-is and what-can-be is very myopic indeed and they are doomed, now and forever."

The Sony FE 200-600mm Lens isn't in the POTN Gear database yet so here are the details for this shot. 600mm, f9 @ 1/100th, iso 100. No extender used for this shot, just cropped in post.

Sony α7R IV / ILCE-a7RM4 • 1/100 • f/9 • ISO 100

IMAGE LINK: https://flic.kr/p/2jBv​K5c Three Quarters by Gene, on Flickr

Gene - My Photo Gallery || My USS Oriskany website || My Flickr
Take nothing but photos - leave nothing but footprints - break nothing but silence - kill nothing but time.

Finally got the moon during the day, late afternoon.

Canon EOS 6D • 1/500 • f/0.95 • ISO 100

Image hosted by forum (1061162) © xa-coupe [SHARE LINK]
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Gear List:
Bodies:R, 6D, 1500D plus an Astro Camera
Lenses: A few L,

navydoc wrote in post #19117066
The Sony FE 200-600mm Lens isn't in the POTN Gear database yet so here are the details for this shot. 600mm, f9 @ 1/100th, iso 100. No extender used for this shot, just cropped in post.

IMAGE LINK: https://flic.kr/p/2jBv​K5c Three Quarters by Gene, on Flickr

That looks to have some very sharp detail Gene. Wouldn't mind seeing a much closer crop of part of the moon. Curious as to how the detail would show up.

Neal
Sony A9/A1, FE 200-600mm F5.6-6.3 G OSS, 16-35mm f/2.8 GM \ Tamron 28-75mm F/2.8 Di III RXD
Benro Gimbal GH5C - Robus RC-8860 Vantage Series 5 Carbon Fiber Tripod
Image editing ok, for re posting on same thread.

4matic wrote in post #19117131
That looks to have some very sharp detail Gene. Wouldn't mind seeing a much closer crop of part of the moon. Curious as to how the detail would show up.

That's an almost 100% crop. Here's a 200 percenter.

Sony α7R IV / ILCE-a7RM4 • 1/100 • f/9 • ISO 100

Image hosted by forum (1061173) © navydoc [SHARE LINK]
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Gene - My Photo Gallery || My USS Oriskany website || My Flickr
Take nothing but photos - leave nothing but footprints - break nothing but silence - kill nothing but time.

navydoc wrote in post #19117139
That's an almost 100% crop. Here's a 200 percenter.

Hosted photo: posted by navydoc in
./showthread.php?p=191​17139&i=i202579706
forum: Astronomy & Celestial

Thanks Gene, thats amazing detail in that at 200%! WOW. The more I see about 7RIV more tempting it is to acquire one!

Neal
Sony A9/A1, FE 200-600mm F5.6-6.3 G OSS, 16-35mm f/2.8 GM \ Tamron 28-75mm F/2.8 Di III RXD
Benro Gimbal GH5C - Robus RC-8860 Vantage Series 5 Carbon Fiber Tripod
Image editing ok, for re posting on same thread.