Camera Work

I'm going to post a few articles that are technical. I know it's OT for this thread, but thought that readers of this thread are more likely to be interested in making photographs. I really don't want to begin a discussion of the topics here as it would further drag the OT, into OT hell.

So, if you want to seriously discuss this or ask questions, please PM me and we can begin a thread on the subject.

What I'm after here, is getting some tools to people who make pictures; knowledge often being the most important tool.

Depth of field

So, this is a series of 3 articles. If you don't think you need to brush-up on your understanding, read part 3 first. Then go back and read all 3 if interested. Several readings may be necessary to digest it all well. A good knowledge of this topic is easily as valuable as a couple of new lenses. AOV, FOV is next.

https://www.bhphotovideo.com/explora/photography/tips-and-solutions/depth-field-part-1

Hyperfocal Distance
https://petapixel.com/2017/07/11/learn-science-deep-focus-hyperfocal-distance/


If you find something that's really good on this topic, please post it.
 
I found this quote in going through the CW archives.

“In no other medium is so much provided automatically; it is difficult today not to get some kind of image on film. It is the last fraction of total photographic quality that identifies the serious professional craftsman or artist. There is no substitute for fine craft; we can have craft without art, but not art without craft”.

Ansel Adams - “Polaroid Land Photography”. 1963/1978
 
gnuyork said:
Do you mean Melvin Sokolsky?

I have his book Seeing Fashion on my coffee table (among others -Ralph Gibson, Sally Mann, Lois Conner). Great photographer.
Click to expand...

Thanks. I didn't check after spell check had it's way with my typing. It took 3 tries to defeat bill gates' spelling bot.

I never know if anyone is reading this stuff..

pkr
 
AOV / FOV. Angle of View / Field of View

https://www.edmundoptics.com/resour...understanding-focal-length-and-field-of-view/

https://en.wikipedia.org/wiki/Angle_of_view


A 35 has an AOV of 63.5 deg , a 28 has 75 deg . When using a 35, at 10' if I step back just 2 1/2 Ft I have the same field of view as with a 28.

At 20 feet from a 30' subject FOV with a 28, you get the same FOV with a 35mm lens at just 25', only a 5' difference.

The step back distance is minimal, until you get to wide fields of view.
http://www.rangefinderforum.com/forums/showthread.php?t=161496




FOV Calculator
http://www.scantips.com/lights/fieldofview.html
 
Filters.. or I suggest, any piece of glass you put in front of your lens must be considered carefully.

https://www.lensrentals.com/blog/20...anking-of-the-major-uv-filters-on-the-market/

Roger, on cheap filters. This is included in the above link too.
https://www.lensrentals.com/blog/2017/05/yet-another-post-about-my-issues-with-uv-filters/



Optics:

One important thing to remember about filters (this is the same for any lens, window, etc.).is that they reflect light from both sides, both surfaces. This can have a big effect on contrast and overall image quality.

http://www.koppglass.com/blog/optical-properties-of-glass-how-light-and-glass-interact/

http://www.optics4kids.org/home/content/what-is-optics/reflection/the-reflection-of-light/



Polarized light:

"Hence, a picture taken in a direction at 90 degrees from the sun can take advantage of this polarization. Actually, the effect is visible in a band of 15° to 30° measured from the optimal direction."

I point my thumb at the sun and with my index finger at 90 degrees to my thumb, i rotate it across the sky to visualize the band of sky effected by a polarizer - in order to previsualize the effect of the filter.

https://en.wikipedia.org/wiki/Polarizing_filter_(photography)

I often use a polarizing filter to enhance color saturation
http://www.cambridgeincolour.com/tutorials/polarizing-filters.htm

The "Feynman Lectures on Physics" , 3 Volumes, are a great resource if you're into that kind of thing.
http://www.feynmanlectures.caltech.edu/I_33.html

http://www.feynmanlectures.caltech.edu/II_33.html

If the math is beyond your understanding, just read the text and study the diagrams. Much understanding can be gleaned from this. You will have a better understanding of why some surfaces don't respond to polarizing filters and a better understanding of glass transmission and reflective surfaces.

ND - Neutral Density filters: If you use these, be sure to get high quality examples as stacking them increases the surface count.
https://www.picturecorrect.com/tips/neutral-density-filter-tips/
 
Summer is here for us north of the equator. Check Joey L's travel tips. Joey has some big miles/Km logged. Then have a look at his work.

https://joeyl.com/blog/all/post/5-critical-tips-for-travel-photographers

Joey's tips aren't for camera lovers, but are quite useful to photographers.

"My first tip for traveling photographers is to protect your gear from theft. There are thieves in every part of the world, not just developing countries. They know how much your pretty camera can fetch for on a black market, and they will risk a lot to steal your gear. When traveling, I make it a point to make my camera look crappy and old. I cover it with duct tape, carry it in a normal, dirty backpack, and make sure all recognizable logos such as “Canon” or “Phase One” are hidden. A nice looking camera case is also a red flag. I prefer typical “consumer” travel packs or using older weathered bags that have seen better days."

Joey Lawrence's portfolio
https://joeyl.com/overview/category/quick-portfolio

Safe traveling to you all, pkr

Update:
When flying, many Pros ship their gear via a shipper rather than risk damage by baggage handlers and TSA people. Usually, shipping 2 days ahead of arrival insures your gear will be there waiting for you. I use Fed-X for most of my critical shipping. Here's a story of serious screw-ups.
https://luxuryrealestateimages.com/ill-never-use-fedex-ship-photo-gear/

How to Fly With Film
http://filmadvance.com/2013/10/how-to-flying-with-film/
 
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