Worldwide Pinhole Photography Day 2020

[scyg]

Here's my entry to this year's gallery:

Made with my Tree Camera™, purpose made (both for photographing trees and for WPPD2020):

 

[narsuitus]

@scyg
Interesting design !
Please described how you calculated the shift/tilt position of the pinhole on your "Tree Camera."

 

[scyg]

@scyg
Please described how you calculated the shift/tilt position of the pinhole on your "Tree Camera."

Thanks for the kind words. The shift was intended to place the horizon 3/4" from the bottom of the frame when the camera is leveled (which is how I intend to use it - that's what the bubble levels are for). The tilt back is to reduce some of the wide-angle astigmatism at the top of the frame. At very wide angles (as in this case, taking into account the shift) the more extreme parts of the image would "see" the pinhole as only a very narrow ellipse, causing astigmatism (loss of sharpness in one direction). The tilt presents more of a circular profile to all parts of the image. Here's a simple diagram of what it does:

You can't really tell in the photo above, but on other images it's pretty clear that most of the fuzziness of the branches above is due to their motion in the wind.

 

[bsdunek]

Very neat idea. Like the result.

 

[Sirius Glass]

Thanks for the kind words. The shift was intended to place the horizon 3/4" from the bottom of the frame when the camera is leveled (which is how I intend to use it - that's what the bubble levels are for). The tilt back is to reduce some of the wide-angle astigmatism at the top of the frame. At very wide angles (as in this case, taking into account the shift) the more extreme parts of the image would "see" the pinhole as only a very narrow ellipse, causing astigmatism (loss of sharpness in one direction). The tilt presents more of a circular profile to all parts of the image. Here's a simple diagram of what it does:

You can't really tell in the photo above, but on other images it's pretty clear that most of the fuzziness of the branches above is due to their motion in the wind.

And when are you going to start selling these on Photrio?

 

[DWThomas]

The tilt back is to reduce some of the wide-angle astigmatism at the top of the frame. At very wide angles (as in this case, taking into account the shift) the more extreme parts of the image would "see" the pinhole as only a very narrow ellipse, causing astigmatism (loss of sharpness in one direction). The tilt presents more of a circular profile to all parts of the image.

Impressive -- I'm guessing one would pick some sort of median pinhole-to-film distance to calculate a pinhole -- any comments on that?

 

[narsuitus]

@scyg

Innovative and brilliant !

Thanks for the information.

I think I will try your concept with a pinhole on my 4x5 view camera to photograph an architectural subject for next year's Worldwide Pinhole day.

How did you calculate the correct exposure time?

 

[scyg]

First of all, thanks everyone for the ego boost. Now on to business:

And when are you going to start selling these on Photrio?

I'd be happy if someone can make a buck making them, but I don't foresee a great commercial success here. The rights are free for the taking.

Impressive -- I'm guessing one would pick some sort of median pinhole-to-film distance to calculate a pinhole -- any comments on that?

Yes, I averaged the shortest (150mm) and longest (~270mm) hole-to-film distances, and got a 0.6mm hole as a result. Actually made it smaller (0.5) based on previous experience.

How did you calculate the correct exposure time?

Educated guesswork and trial and error. Too many variables for any actual calculations.

 

[DWThomas]

Yes, I averaged the shortest (150mm) and longest (~270mm) hole-to-film distances, and got a 0.6mm hole as a result. Actually made it smaller (0.5) based on previous experience.

Thanks! One of my favorite things about WPPD is seeing the huge variety of creative efforts people come up with.

 

[Nick Dvoracek]

If you haven’t gotten your Pinhole Day photo submitted to the gallery at pinholeday.org,, this year we’ve extended the deadline until June 30th to accommodate the pandemic difficulties.

 

[Donald Qualls]

Thanks for the reminder -- I need to pick one of mine and submit it.

Edit: Okay, done. After it's approved, you can view it here.

 

[narsuitus]

Edit: Okay, done. After it's approved, you can view it here.

I could not see your photo at the link you gave but I did see it at this link:

http://pinholeday.org/gallery/2020/index.php?id=1199

 

[DWThomas]

I could not see your photo at the link you gave but I did see it at this link:

http://pinholeday.org/gallery/2020/index.php?id=1199

I remember observing that problem in a previous year. The link they sent back had problems in that it didn't specify the gallery for a specific year. If I modified a link from an earlier year to the current year and photo number, all was well. Maybe a semi-automated process at their end hasn't been updated to reflect some change in gallery hierarchy. Some script needs a tweak perhaps.

 

[Nick Dvoracek]

There’s nothing as dangerous as an extended deadline. To compensate for the abnormal year, we extended the submission period for Worldwide Pinhole Photography Day until June 30th (midnight GMT, by the way). httpinholeday.org. I promised last year to be a nag so no one accidentally misses the opportunity. Consider yourselves warned.

Oh and take a look at the gallery while you’re there. I hate to say anything nice about the pandemic, but the relative concentration of committed pinholers really shows.

 

[DWThomas]

Oh and take a look at the gallery while you’re there. I hate to say anything nice about the pandemic, but the relative concentration of committed pinholers really shows.

This is true! Quite a few shots shared the consequences of lockdowns around the world. I always find it fascinating to go through the gallery. Such a wide variety of ideas, virtual visits to places I'll never get to, etc. The only thing I think has suffered a bit this year is the group workshop sorts of efforts. That's obviously understandable, but too bad. It is interesting to see young kids in some faraway place who are obviously enjoying the process. Even if their results suffer technical problems, you can sense their excitement at photographing friends and local landmarks to share with the rest of us.

Hopefully we'll all be at it again in 2021!

 

[Donald Qualls]

Hopefully we'll all be at it again in 2021!

"By hook or by crook, we will!" -- Number 2

 

[NedL]

The solstice today is a twice-yearly "pinhole day" for me... This afternoon I'll be hiking around replacing various solargraphy cans. This morning I prepared a few new ones and am waiting for the flat black "camouflage" paint to dry before I head out.

This one was found by someone recently and moved, but not opened or taken... I noticed it had been tampered with and grabbed it on June 8th. It was put in place on the winter solstice last December. ( 5x7 inch photopaper in a tin can )

 

[Roger Thoms]

Here’s a link to my submission.
http://www.pinholeday.org/gallery/2020/?id=1362

Roger

 

[mooseontheloose]

Roger, looks like we both got our photos in at the last minute!
Link to my submission: https://pinholeday.org/gallery/2020/index.php?id=1356&Country=Japan

 

[Roger Thoms]

Roger, looks like we both got our photos in at the last minute!
Link to my submission: https://pinholeday.org/gallery/2020/index.php?id=1356&Country=Japan

Your photo looks great, the lack of people definitely makes it. The extended deadline also got me, seems like the more time I have the less likely I'll get it done.

Roger

 

[mooseontheloose]

Although another thread has been started about this, I thought I would mention it here as well - a video has just gone up on YouTube featuring everyone who participated in this year's WPPD. It's in alphabetical order by first name, so you should be able to find yourself fairly easily.

 

[Roger Thoms]

Thanks for posting the video, just watched on the “big screen”

Roger