Intervalometer for A6400 +30s exposure

Started 4 months ago | Discussions
danny006 Senior Member • Posts: 1,414
Intervalometer for A6400 +30s exposure

I’m planning to modify my A6400 for astrophotography. But I need to know if I can take long exposures like 2min or more. With the built-in intervalometer this isn’t possible so what about an external intervalometer? Since I don’t want to use a laptop I’m not interested in some kind of software. And bulb mode is not a solution.

 danny006's gear list:danny006's gear list
Sony a6400 Sony E 16-50mm F3.5-5.6 PZ OSS Sony 1.4x Teleconverter (2016) Sony FE 200-600 F5.6-6.3
Jack Tingle
Jack Tingle Contributing Member • Posts: 744
Re: Intervalometer for A6400 +30s exposure

danny006 wrote:

I’m planning to modify my A6400 for astrophotography. But I need to know if I can take long exposures like 2min or more. With the built-in intervalometer this isn’t possible so what about an external intervalometer? Since I don’t want to use a laptop I’m not interested in some kind of software. And bulb mode is not a solution.

Why not? A locking remote release, bulb mode & a kitchen timer would seem to meet your needs. Release the lock when you hear "ding."

Back in the day, you'd just release the cable release thumbscrew when time ran out. My Olympus wired release was $10 & has a little plastic slide lock under the button.

 Jack Tingle's gear list:Jack Tingle's gear list
Canon PowerShot SX720 HS Panasonic Lumix DC-ZS70 Olympus OM-D E-M10 II Olympus M.Zuiko Digital ED 40-150mm 1:4-5.6 Olympus M.Zuiko Digital 14-42mm 1:3.5-5.6 II R +5 more
hha Contributing Member • Posts: 678
Re: Intervalometer for A6400 +30s exposure
1

danny006 wrote:

I’m planning to modify my A6400 for astrophotography. But I need to know if I can take long exposures like 2min or more. With the built-in intervalometer this isn’t possible so what about an external intervalometer? Since I don’t want to use a laptop I’m not interested in some kind of software. And bulb mode is not a solution.

I have used the same JJC intervalometer on my Nikon D3200, D3300, D7200 and Z6. I set the camera to B. the intervalometer to 60 sec, the delay to 2 seconds and 240 shots. The Z6 internal clock thinks it is 59,6sec, but that is close enough. I then have 4 hours to do other things. . You can stop the sequence anytime, but after 4 hours the battery on the Z6 is down to about 20%.

www.jjc.cc and look for intervalometers with the connector for your camera. About $20.

Cheers,

hha

 hha's gear list:hha's gear list
Olympus TG-630 iHS Nikon D3200 Nikon D3300 Nikon D7200 Nikon Z6 +4 more
82Virago Regular Member • Posts: 336
Re: Intervalometer for A6400 +30s exposure
1
Tristimulus Veteran Member • Posts: 8,873
Re: Intervalometer for A6400 +30s exposure
1

Just stack 30 sec exposures.

With CMOS image sensors there is little difference between stacking 30 sec, 1 min, 2 min and 4 min subs.

In my tests (some light pollution) 1 min sub exposures is the sweet spot. Do hardly see any difference whrn stacking lots of 30 sec exposures - so that it is in my case.

Longer sub exposures is a relic from tge days of photographic film (reciprocity) and CCD cameras (much higher read noise than CMOS image sensors).

Shorter sub exposures than about 8 - 15 sec is byond the soft spot.

Just try for yourself.

OP danny006 Senior Member • Posts: 1,414
Re: Intervalometer for A6400 +30s exposure

82Virago wrote:

I bought this from Amazon:

https://www.amazon.ca/Neewer%C2%AE-Shutter-Release-MarkIII-MarkII/dp/B01FFFDX6C/ref=sr_1_23?dchild=1&keywords=neewer+6+in+1+intervalometer&qid=1632552068&s=electronics&sr=1-23

Comes with plugs for many cameras including some Sony. Works great.

Cheers

So you can program for example 100 shots of 2min exposures?

 danny006's gear list:danny006's gear list
Sony a6400 Sony E 16-50mm F3.5-5.6 PZ OSS Sony 1.4x Teleconverter (2016) Sony FE 200-600 F5.6-6.3
OP danny006 Senior Member • Posts: 1,414
Re: Intervalometer for A6400 +30s exposure

Tristimulus wrote:

Just stack 30 sec exposures.

Does that mean with 30s you don’t need autoguiding?

 danny006's gear list:danny006's gear list
Sony a6400 Sony E 16-50mm F3.5-5.6 PZ OSS Sony 1.4x Teleconverter (2016) Sony FE 200-600 F5.6-6.3
hha Contributing Member • Posts: 678
Re: Intervalometer for A6400 +30s exposure
2

danny006 wrote:

Tristimulus wrote:

Just stack 30 sec exposures.

Does that mean with 30s you don’t need autoguiding?

I use 1 minute subs  with an IOptron Skytacker and up to 200 mm focal length. Since my polar alignment is not perfect, there are trails during one minute, but they are less than one pixel long. There is also the 24 arcsec worm error of the IOptron ( it has a 9 minute period)  and structral flexing of your setup as you get into several hour exposures. Sequator takes care of all of this by digitally registering all images in a sequence to the image at the center of the sequence. 240 images take about 5 minutes to register on my laptop. You can think of it as a digital autoguider, as opposed to a mechanical/optical autoguider.

Cheers,

hha

 hha's gear list:hha's gear list
Olympus TG-630 iHS Nikon D3200 Nikon D3300 Nikon D7200 Nikon Z6 +4 more
Tristimulus Veteran Member • Posts: 8,873
Re: Intervalometer for A6400 +30s exposure
1

danny006 wrote:

Tristimulus wrote:

Just stack 30 sec exposures.

Does that mean with 30s you don’t need autoguiding?

Yes - I have thrown away all my guiding stuff and go for 30 sec unguided sub exposures all the way now.

Have tried out everything from 1 sec to 4 min sub exposures.

The sweet spot in my case seems to be 1 minute sub exposures. But 30 sec sub exposures give pretty much the same end result and less smearing by turbulence. So - to me - that is the perfect compromise.

Note that I have some light pollution, under a really dark sky 1 to 2 min subs would do a somewhat better job. However most of us do live in populated and artificially lit areas.

From my personal tests 15 sec subs are a minimum, and exposures longer than 1 min do not add anything but more smearing by turbulence and some tracking errors.

By all means test for yourself and go for your personal best compromise.

JimH123 Veteran Member • Posts: 3,358
Re: Intervalometer for A6400 +30s exposure
1

danny006 wrote:

82Virago wrote:

I bought this from Amazon:

https://www.amazon.ca/Neewer%C2%AE-Shutter-Release-MarkIII-MarkII/dp/B01FFFDX6C/ref=sr_1_23?dchild=1&keywords=neewer+6+in+1+intervalometer&qid=1632552068&s=electronics&sr=1-23

Comes with plugs for many cameras including some Sony. Works great.

Cheers

So you can program for example 100 shots of 2min exposures?

Absolutely.  You place the camera in bulb mode, and then program the intervalometer for the desired shutter time.  And you can use noise reduction where the camera takes a second shot by programming the intervalometer for a wait time between shots.

 JimH123's gear list:JimH123's gear list
Nikon Coolpix P1000 Sony RX100 VII Olympus E-M5 II Sony a6300 Olympus E-M1 II +2 more
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