Author Topic: Objects for scale  (Read 957 times)

Offline Joe Duxbury

  • menacing presence
  • **
  • Posts: 217
Objects for scale
« on: August 22, 2021, 10:03:47 am »
What do you cave photographers like to use to give a close-up shot some scale? A karabiner? An AA battery? Is there consensus as to what looks best?

Offline wellyjen

  • menacing presence
  • **
  • Posts: 170
Re: Objects for scale
« Reply #1 on: August 22, 2021, 10:16:12 am »
Don't know about photographs, but for surveys, if your discovery is sufficiently impressive, then to scale 747 jumbo jet outlines are a popular choice.
Can't sleep. Clowns will eat me.
CCPC

Online Fulk

  • forum hero
  • *****
  • Posts: 4714
Re: Objects for scale
« Reply #2 on: August 22, 2021, 04:42:04 pm »
A ruler.

Offline yrammy

  • forum star
  • ****
  • Posts: 539
Re: Objects for scale
« Reply #3 on: August 23, 2021, 08:43:19 am »
why not buy inexpensive measure strip as used in archaeology. https://www.geologysuperstore.com/product/field-scale-card/

Online ChrisJC

  • Funky
  • forum hero
  • *****
  • Posts: 1724
    • http://www.cowdery.org.uk
Re: Objects for scale
« Reply #4 on: August 23, 2021, 08:56:14 am »
We generally use whatever is available, which is either a full size human being if it's a large object, or a hand / finger if it's smaller. It's definitely not photogenic!, but it is a good record.

Chris.
--
http://www.cowdery.org.uk
Mines, caves,
Land Rovers

Offline ZombieCake

  • forum hero
  • *****
  • Posts: 1363
Re: Objects for scale
« Reply #5 on: August 23, 2021, 09:40:24 am »
Past Horizons also has some useful photo scales and other stuff.  I'm that sad (or maybe optimistic) I keep the credit card photo scale in my wallet!

https://www.pasthorizonstools.com/category_s/1831.htm

Offline Allan

  • player
  • **
  • Posts: 107
Re: Objects for scale
« Reply #6 on: August 23, 2021, 09:50:40 am »
Traditionally a Mars Bar was a popular choice as many cavers carried them.

Offline ALEXW

  • menacing presence
  • **
  • Posts: 169
Re: Objects for scale
« Reply #7 on: August 23, 2021, 10:10:30 am »
To be useful a scale object has to be a known and fixed size. Mars bars get smaller every year, shrinkflation.

Online cavemanmike

  • junky
  • ****
  • Posts: 787
  • ucet
Re: Objects for scale
« Reply #8 on: August 23, 2021, 10:30:31 am »
Human for larger objects.
Krab for smaller objects

Offline pwhole

  • forum hero
  • *****
  • Posts: 3255
  • TSG, DCA, PDMHS
    • Phil Wolstenholme website
Re: Objects for scale
« Reply #9 on: August 23, 2021, 11:24:56 am »
For larger objects a ranging rod is usually good, but they're very expensive. I bought 2m of 16mm white pvc pipe and a roll of red insulating tape from B&Q, and got three ranging rods (1m and 2 X 0.5m) out of it for about £3.50. Smaller ones would be even easier. They weigh nothing, are waterproof and very strong. A 20cm one would take about five mins to make and mere pence in cost. That said, the field scale card yrammy suggested would probably be even better.

Offline Graigwen

  • forum star
  • ****
  • Posts: 625
Re: Objects for scale
« Reply #10 on: August 23, 2021, 11:45:54 am »
In the good old days of cave photography, in other words when hardly anyone did it, a standard flash bulb was often used.

(There is an example of this in one of the 60s photos I recently put on the trashed Aggie thread.)

.

Offline The Old Ruminator

  • forum hero
  • *****
  • Posts: 3764
Re: Objects for scale
« Reply #11 on: August 24, 2021, 08:23:27 am »
I hardly ever use an object for scale with macro now. It tends to destroy the artistic merit in my view. Straws are useful as they have a fairly fixed circumference size other than that nothing. For larger views obviously a person but not a posed grinning twerp if possible. Getting a human subject to look right is quite difficult. Sadly not everyone makes a good subject either. Stance and expression are areas where care has to be taken.

Online Cantclimbtom

  • forum star
  • ****
  • Posts: 502
Re: Objects for scale
« Reply #12 on: August 25, 2021, 09:43:56 am »
https://www.ebay.co.uk/itm/132156209176?hash=item1ec51fb818:g:7RwAAOSwpkFY7Oxk

It has the added advantage of making the formations look slightly larger and more impressive compared to someone of average height. And again... the miniature to make things look HUGE
Expert in incompetent tomfoolery

 

Main Menu

Forum Home Help Search
SimplePortal 2.3.5 © 2008-2012, SimplePortal