My Broom Pro

Show and tell for your homebrew nv projects. DIY 'Stickies' here too.
mtnbowhunter
Posts: 115
Joined: 12 Jun 2013, 06:05
Location: WA, USA

Re: My Broom Pro

Post by mtnbowhunter » 29 Mar 2015, 22:28

my apology if I have gotten this thread off topic???!!!

so, if a larger sensor will give more FOV and clarity, what if any decent nv/ir options exist for cameras /boards that offer considerably larger sensor area???

phoenix
BRUCE ALMIGHTY
Posts: 4868
Joined: 09 May 2012, 14:40
Location: Aberdeen

Re: My Broom Pro

Post by phoenix » 30 Mar 2015, 06:21

1/2 is about the largest sensor your likely to see in a camera used for NV, and the majority are 1/3.
Digital camera sensors, particularly digital SLR camera sensors are much larger and have many more pixels.
However, the huge amount of data produced by these large sensors is difficult to process at normal video speeds and a normal composite video signal simply can't handle all the data.
Some DSLRs have an HDMI output than can connect to an HDMI monitor but that's not very practical for a gun mounted NV device.

Cheers

Bruce
LAND ROVER - THE WORLD'S WORST 4X4 BY FAR

qer18
Posts: 5
Joined: 30 Mar 2015, 15:24
Location: USA

Re: My Broom Pro

Post by qer18 » 30 Mar 2015, 16:11

I would like that!

mtnbowhunter
Posts: 115
Joined: 12 Jun 2013, 06:05
Location: WA, USA

Re: My Broom Pro

Post by mtnbowhunter » 18 Apr 2015, 04:44

about the Zenit F1.6 / 85mm lens as used on various nv units
- will this lens have M42 threads?
- does it matter on these and the F1.5/100mm Zenit lenses if they do not have IR stamped on them?

Radagast
junior librarian
Posts: 2617
Joined: 04 Apr 2013, 10:51
Location: Sydney Australia

Re: My Broom Pro

Post by Radagast » 18 Apr 2015, 08:26

The older lens are often M42, but they don't have adjustable aperture. No clue about IR.

andybig
Posts: 916
Joined: 11 Sep 2013, 00:24
Location: coventry

Re: My Broom Pro

Post by andybig » 18 Apr 2015, 09:33

mtnbowhunter wrote:about the Zenit F1.6 / 85mm lens as used on various nv units
- will this lens have M42 threads?
- does it matter on these and the F1.5/100mm Zenit lenses if they do not have IR stamped on them?
I dont know why some have Ir stamped on some and not on others.
As long as its coming of an zenit NV-100 it will be fine.

Just an extra note. The zenit f/1.5 100mm lens DOES have an adjustable aperture
Yes you are correct, they do have a M42 thread.

Radagast
junior librarian
Posts: 2617
Joined: 04 Apr 2013, 10:51
Location: Sydney Australia

Re: My Broom Pro

Post by Radagast » 18 Apr 2015, 10:31

I was talking about the 85mm lens, which lack an aperture.

Paul1961
Posts: 241
Joined: 17 Jun 2013, 11:19
Location: Melbourne, Australia

Re: My Broom Pro

Post by Paul1961 » 18 Apr 2015, 12:38

Whilst on the subject of the Zenit lenses, can anyone who has the 100mm f/1.5 version tell me how much it weighs and it's maximum outside diameter?

Rummaging through some of the stuff thrown out at work, found a Kowa 100mm f/1.5 lens from an old x-Ray imaging chain. Lens is nice, made in Japan, but it's in a thick Al housing which I think will be too heavy to be practical mounted on a rifle. Not to mention no threads for end mounting, not that it couldn't be done on a lathe.

Regards

Paul

andybig
Posts: 916
Joined: 11 Sep 2013, 00:24
Location: coventry

Re: My Broom Pro

Post by andybig » 18 Apr 2015, 12:45

Paul1961 wrote:Whilst on the subject of the Zenit lenses, can anyone who has the 100mm f/1.5 version tell me how much it weighs and it's maximum outside diameter?

Rummaging through some of the stuff thrown out at work, found a Kowa 100mm f/1.5 lens from an old x-Ray imaging chain. Lens is nice, made in Japan, but it's in a thick Al housing which I think will be too heavy to be practical mounted on a rifle. Not to mention no threads for end mounting, not that it couldn't be done on a lathe.

Regards

Paul
It weight is 1Lb 6oz (650 grams) and the OD is almost 75mm

Paul1961
Posts: 241
Joined: 17 Jun 2013, 11:19
Location: Melbourne, Australia

Re: My Broom Pro

Post by Paul1961 » 18 Apr 2015, 13:27

Thank you

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