#1  
Old 14-06-2019, 10:48 PM
thunderchildobs
Registered User

thunderchildobs is offline
 
Join Date: Dec 2006
Location: Ipswich, Qld, Aust
Posts: 605
How bright are you

and your lights?

Image A: The Qld Astrofest imaging field. Not my setup.
Image B: Testing a new observing tent. There is a laptop with a white image on the screen. The laptop is in a box. The light is still to bright.
Image C: A simple solution a tarp over the tent. Also do not point the laptop screens towards the open tent door. Even with the tent covered I would still put a red filter over the screen.
These images were all at 30 seconds at 1600ISO.


The following show how bad a red led torch can be. The torch was a Celestron firecell which has 4 led lights in it.

Image D: For reference picture of my house from 20m away with no torch lights.
Image E: The torch unmodified, 15 seconds held at head height.
Image f: The torch covered in black tape with a 5mm x 5mm hole over 1 led. Still to bright.
Image G: The torch unmodified looking directly in to the camera.
Image H: The torch with a covered lens.

The images are 15seconds at 1600ISO.

Obviously what you do in your backyard is not a problem, but at astrocamps it is another issue. Do you really need a torch that can light up buildings, telescopes and eyes from 20m away?

I wont be using the Firecell torch anywhere near any observing fields.
Attached Thumbnails
Click for full-size image (A_Tent_30secs.jpg)
75.7 KB109 views
Click for full-size image (B_Tent_30secs.jpg)
98.6 KB112 views
Click for full-size image (C_Tent_30secs.jpg)
96.2 KB127 views
Click for full-size image (D_House_30secs.jpg)
95.8 KB131 views
Click for full-size image (E_Torch_15secs.jpg)
102.4 KB154 views
Click for full-size image (F_Torch_Covered_15secs.jpg)
56.0 KB85 views
Click for full-size image (G_LED_15Secs.jpg)
80.5 KB127 views
Click for full-size image (H_LED_Covered_15Secs.jpg)
55.7 KB129 views
Reply With Quote
  #2  
Old 15-06-2019, 08:08 AM
Granada
The truth is out there

Granada is offline
 
Join Date: Feb 2016
Location: Melbourne
Posts: 176
I recently went to the ASV's LMDSS and used a red bike light as a torch to find and set up my equipment. Got politely told that if there was an event there that someone would probably complain about the intensity of the light, and it was suggested that I consider getting a lower powered red light. Although I understand and respect the comment, I also want to be safe when moving around and not lose anything accidentally, so it's a really fine balance between those two things.
Reply With Quote
  #3  
Old 15-06-2019, 09:35 AM
Wilso
Registered User

Wilso is offline
 
Join Date: Nov 2016
Location: Adelaide
Posts: 414
I don’t really like the bright red led lights either and I mainly observe by myself.
Pick up an army helmet light last year off an eBay auction (they are too dear to buy new) Has white, red, blue and ir light with 4 brightness settings.
The low red illumination is only 1.5 lumens which is very dim and has over a 100hr runtime. Can be clipped to your jacket, case etc
Perfect!
Streamlight Sidewinder compact11
Attached Thumbnails
Click for full-size image (91DB007C-28C2-4A13-80C4-E93606D59767.jpg)
185.7 KB117 views

Last edited by Wilso; 15-06-2019 at 02:09 PM. Reason: Add
Reply With Quote
  #4  
Old 15-06-2019, 04:32 PM
astroron's Avatar
astroron (Ron)
Supernova Searcher

astroron is offline
 
Join Date: Mar 2005
Location: Cambroon Queensland Australia
Posts: 9,313
Quote:
Originally Posted by Granada View Post
I recently went to the ASV's LMDSS and used a red bike light as a torch to find and set up my equipment. Got politely told that if there was an event there that someone would probably complain about the intensity of the light, and it was suggested that I consider getting a lower powered red light. Although I understand and respect the comment, I also want to be safe when moving around and not lose anything accidentally, so it's a really fine balance between those two things.
after you are dark adapted you should not need a light to walk around.
because you are so reliant on your red light,you are losing the value of the darkness.
try doing it sometime,it really works.
Reply With Quote
  #5  
Old 16-06-2019, 08:16 AM
Granada
The truth is out there

Granada is offline
 
Join Date: Feb 2016
Location: Melbourne
Posts: 176
Quote:
Originally Posted by astroron View Post
because you are so reliant on your red light,you are losing the value of the darkness.

Not sure how you drew this conclusion, I said I used a red light to "find and set up my equipment". I then let my eyes adjust to the dark just like everyone else



Quote:
Originally Posted by astroron View Post
try doing it sometime,it really works.

Last edited by sheeny; 18-06-2019 at 05:51 PM. Reason: off topic confrontational
Reply With Quote
  #6  
Old 16-06-2019, 08:19 AM
Tropo-Bob (Bob)
Registered User

Tropo-Bob is offline
 
Join Date: Sep 2013
Location: Cairns
Posts: 1,584
Answer- Not very bright:- Because I thought that was going to be an IQ Test.
Reply With Quote
  #7  
Old 18-06-2019, 11:10 AM
N1 (Mirko)
Registered User

N1 is offline
 
Join Date: Oct 2013
Location: Dunners Nu Zulland
Posts: 1,662
I haven't convinced myself yet to attend an astro meet in the field. I view them as compromises of being social versus observing versus imaging. That's fine if you aren't too worried about exhausing each of these to their full potential, but if you do, my experience is that nothing trumps being alone.
Reply With Quote
  #8  
Old 18-06-2019, 12:40 PM
gaseous's Avatar
gaseous (Patrick)
Registered User

gaseous is offline
 
Join Date: May 2016
Location: Brisbane
Posts: 782
Quote:
Originally Posted by N1 View Post
I haven't convinced myself yet to attend an astro meet in the field. I view them as compromises of being social versus observing versus imaging. That's fine if you aren't too worried about exhausing each of these to their full potential, but if you do, my experience is that nothing trumps being alone.

Those last 4 words sum up everything I love about astronomy.
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 02:33 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Advertisement
Testar
Advertisement
Bintel
Advertisement