NikonGear'23

Gear Talk => What the Nerds Do => Topic started by: Akira on October 17, 2019, 11:53:10

Title: The dim red LED flashlight project continued
Post by: Akira on October 17, 2019, 11:53:10
A few days ago, I started the thread for this little DIY project of a dim red LED flashlight:

https://nikongear.net/revival/index.php?topic=8952.0

To continue the project, I made another version which can be mounted onto the hotshoe of the camera.

Here are the parts and the competed flashlight:

1. The main parts: from top right, counter clockwise: a battery holder for CR2032, a mini switch, a red LED, a 1.8k ohm resistor and a plastic hotshoe cover.

2. The completed dim red LED flashlight.

I painted the metal parts of the switch and the contact of the holder black and masked the part of the battery with the black tape to avoid the unwanted reflection of the LED light from them.
Title: Re: A football fish is a friend of night photographers
Post by: Akira on October 17, 2019, 12:22:57
3. How it mounts on the camera.

4. And this is how it looks in the darkness (with X-T3 set to night mode!).

Sorry for the abysmal image quality.  These images were taken with the iPad Air and significantly cropped, and then their sizes were doubled in the editor.  :(
Title: Re: The dim red LED flashlight project continued
Post by: Erik Lund on October 17, 2019, 15:56:49
 :o Quite unique  ;D Looking forward to the next edition
"The eye is blind if the mind is absent." - Confucius
Title: Re: The dim red LED flashlight project continued
Post by: Tristin on October 17, 2019, 17:29:33
Neat, I like it!  Have you considered covering the wires with some sort of body so it can withstand being tossed in your bag?
Title: Re: The dim red LED flashlight project continued
Post by: Akira on October 17, 2019, 17:48:52
:o Quite unique  ;D Looking forward to the next edition
"The eye is blind if the mind is absent." - Confucius

Thank you Erik!  The eye is also blind if the light is absent.  :D


Neat, I like it!  Have you considered covering the wires with some sort of body so it can withstand being tossed in your bag?

Thank you, Tristin!  To protect the wires, I may rather look for some plastic case of fitting size.
Title: Re: The dim red LED flashlight project continued
Post by: pluton on October 17, 2019, 19:26:45
This is a very good idea.  I can remember many times when this device would have been helpful. 
Title: Re: The dim red LED flashlight project continued
Post by: Ann on October 17, 2019, 20:08:22
Most ingenious!
Title: Re: The dim red LED flashlight project continued
Post by: Akira on October 17, 2019, 20:34:31
This is a very good idea.  I can remember many times when this device would have been helpful.

Thank you Keith!  I would wonder why such a simple device wasn't produced in your professional scene...


Most ingenious!

Thank you, Ann!
Title: Re: The dim red LED flashlight project continued
Post by: Tristin on October 17, 2019, 22:37:22
Was out doing some nighttime tripod shooting with my Z6 and no aperture reporting . . . found myself wishing I had one of these!
Title: Re: The dim red LED flashlight project continued
Post by: Thomas Stellwag on October 18, 2019, 15:32:59
I like the 8 amp switch   :)  enough reserve for stronger "tele" LED

Title: Re: The dim red LED flashlight project continued
Post by: pluton on October 18, 2019, 20:31:21
I like the 8 amp switch   :)  enough reserve for stronger "tele" LED
The switch could be smaller.  A push on/push off micro switch would be my choice.
Title: Re: The dim red LED flashlight project continued
Post by: Akira on October 19, 2019, 00:46:35
Was out doing some nighttime tripod shooting with my Z6 and no aperture reporting . . . found myself wishing I had one of these!

Hmm...there seems to be more demands than I had imagined...


I like the 8 amp switch   :)  enough reserve for stronger "tele" LED

You could make a better one than the "Better Beamer".  :D


The switch could be smaller.  A push on/push off micro switch would be my choice.

This one was intended for the operation with big hands or with hands wearing gloves.  I've already located an alternating switch of such kind, and I could make another one with it that can go right into a 135 film canister.
Title: Re: The dim red LED flashlight project continued
Post by: Tristin on October 19, 2019, 02:17:34
Hmm...there seems to be more demands than I had imagined...

With FTZ rejecting aperture reporting, certainly.  You have inspired me to get something similar cooked up before I head to Poland in a couple weeks.  The concept was tantalizing back when I shot 5D w/50/1.2, but, becoming quickly accustomed to having no aperture reporting, I forgot it.  Then the D750 taught me what it was like to have aperture reporting and, thus, was I spoiled, and yearn for knowing my aperture without counting clicks.  Also it is critical for me to not be seen, as Oakland is very "diverse", so red light is just perfect.  Thanks for the inspiration Akira.
Title: Re: The dim red LED flashlight project continued
Post by: Akira on October 19, 2019, 05:12:49
With FTZ rejecting aperture reporting, certainly.  You have inspired me to get something similar cooked up before I head to Poland in a couple weeks.  The concept was tantalizing back when I shot 5D w/50/1.2, but, becoming quickly accustomed to having no aperture reporting, I forgot it.  Then the D750 taught me what it was like to have aperture reporting and, thus, was I spoiled, and yearn for knowing my aperture without counting clicks.  Also it is critical for me to not be seen, as Oakland is very "diverse", so red light is just perfect.  Thanks for the inspiration Akira.


Glad to be of any help, Tristin!

If you have a normal flashlight, you could put a Kodak 89B gel filter (or some equivalent that cuts around 720nm) in front of the reflector.  89B is known to be an infrared filter but actually transmits very deep visible red, so it can turn a normal flashlight into a dim red light one which can function similarly to the first version of my project.
Title: Re: The dim red LED flashlight project continued
Post by: Erik Lund on October 21, 2019, 14:52:44
Back in the good old film-days, F3, F4 and F5 aperture information was relayed through Nikon's "ADR" (Aperture Direct Readout) which was a window at the top center of the viewfinder that got its information from a micro-prism that read the small numbers at the top of the mounted lens AI and Ais lenses aperture numbers.If I recall correctly it was on/off illuminated on F5,,,
Title: Re: The dim red LED flashlight project continued
Post by: Akira on October 21, 2019, 15:20:13
Back in the good old film-days, F3, F4 and F5 aperture information was relayed through Nikon's "ADR" (Aperture Direct Readout) which was a window at the top center of the viewfinder that got its information from a micro-prism that read the small numbers at the top of the mounted lens AI and Ais lenses aperture numbers.If I recall correctly it was on/off illuminated on F5,,,

Nikon offered DL-1 for F2: a small illuminator that could be attached to the prism finder and lit the exposure meter.

I wasn't aware that F5 had the function to llluminate the aperture index of the Ais lens.
Title: Re: The dim red LED flashlight project continued
Post by: Erik Lund on October 21, 2019, 15:27:01
I can check it when I get home from work ;)
Title: Re: The dim red LED flashlight project continued
Post by: Erik Lund on October 21, 2019, 21:55:27
Only ambient light in the DAR on F5
Title: Re: The dim red LED flashlight project continued
Post by: Øivind Tøien on October 22, 2019, 07:46:28
Back in the good old film-days, F3, F4 and F5 aperture information was relayed through Nikon's "ADR" (Aperture Direct Readout) which was a window at the top center of the viewfinder that got its information from a micro-prism that read the small numbers at the top of the mounted lens AI and Ais lenses aperture numbers.If I recall correctly it was on/off illuminated on F5,,,

Only ambient light in the DAR on F5

It is illuminated on the F4, provided that the switch on the front of the shutter speed dial is turned on:
Title: Re: The dim red LED flashlight project continued
Post by: Tristin on October 22, 2019, 08:10:54
It is illuminated on the F4, provided that the switch on the front of the shutter speed dial is turned on:

*drool*
Title: Re: The dim red LED flashlight project continued
Post by: Øivind Tøien on October 22, 2019, 08:13:26

*drool*


 ;D ;D ;D
Title: Re: The dim red LED flashlight project continued
Post by: Akira on October 22, 2019, 10:37:21
It is illuminated on the F4, provided that the switch on the front of the shutter speed dial is turned on:

Wow!  (But not red...  :D )
Title: Re: The dim red LED flashlight project continued
Post by: Øivind Tøien on October 22, 2019, 10:53:03
Wow!  (But not red...  :D )
No and it will likely not reach the distance scale. Yours is better, well done!  :D
Title: Re: The dim red LED flashlight project continued
Post by: Erik Lund on October 22, 2019, 11:25:23
Ahh yes of course the F4  ;D Thanks!!! I mixed them up apparently, I also thought Nikon would have used it on F5 as well, but ok,,, new model is not always better  :o F6 didn't even have DAR,,,Yes,  replace the led  for a red one in the F4, would be nice hack  8)
BTW the focus motor for AF and AF-D lenses in the F5 is brutal, instant full power turning the screwdriver motor  :o both in AF-C and S,,, I would almost call it violent  :o
It's quite clear the later cameras have a much more sophisticated Af motor control with subtle speed control of the motor apparently slowing down for nailing focus, testing it against the D850 which is not slow just very different.
The F5 only slow down if the light is dim or target unclear,,, same does D850

Makes me want to buy some rolls of film and run through it to reexperience the F5 again, I recall it was almost impossible to make a bad exposure with F5, even with flash outdoors.
Title: Re: The dim red LED flashlight project continued
Post by: Akira on October 22, 2019, 11:40:02
No and it will likely not reach the distance scale. Yours is better, well done!  :D

Thank you!  :)


BTW the focus motor for AF and AF-D lenses in the F5 is brutal, instant full power turning the screwdriver motor  :o both in AF-C and S,,, I would almost call it violent  :o

I remember trying F5 at a Nikon show room in Shinjuku, half-pressed the shutter button with my finger inadvertently touched the focus ring of AF-D 50/1.4.  Sure enough, the camera suddenly jumped on my hands and I was about to drop the combo!   :o :o :o  I realized the power of its AF motor was scary!