This week we talk about making your own lenses, why Back Focal Length is meaningless to Ethan, and how to play around with loose achromat lens elements to make your own, homemade lens.
The formula: Formula:
F = (f1 x f2) / (f1 + f2 - d)
BFL = (f2 x (d - f1)) / (d - (f1 + f2))
f1 is the front lens,
f2 is the back lens,
d is the distance between the lenses.
F is the focal length,
BFL is the distance between the back lens and the recording media (film, sensor)
A link to a spreadsheet with the formula in it: https://docs.google.com/spreadsheets/d/1yQ3dsD0Rs-HflRcnPYHSmK0soLXtykGAPl8pdZcrBpM/edit?usp=sharing
Special thanks to Erik Mathy (https://www.instagram.com/erikhmathy/ @erikmathy).
We first heard about this formula on an episode of the Large Format Photography Podcast (https://largeformatphotographypodcast.podbean.com/)
We also talk about a modified Adolescent Crown Graphic Nick's working on.
Ethan mostly tells Graham his formula is wrong.
Graham mostly tells Ethan he names his products after rodents and wonders when the Cameradactyl Chipmonk is coming out.
Graham offers to give away a bunch of darkroom equipment to someone in Northeastern Florida (Jacksonville to Ocala, Daytona to Gainesville). Email Graham@homemadecamera.com if you are interested.
Warning, Graham swears at the very end. If this had been edited by Simon of the LFPP and Classic Lenses, there would have been a gap where you guessed what Graham said but because Graham edited the show, you hear a bunch of F-words in a row.
Finally, we may be taking the month of November off from recording. Don't worry, we'll be back by the Winter Solstice when things are darkest.
In this episode Ethan shows the guys his latest Kickstarter project and walks them through the design process from start to finish.
You can check out the Kickstarter for the final product here:
Check out the Youtube Video here:
In this episode the boys talk to Graham Burnett of Graflexparts.com. Graham is an excellent repairman and modifier of graflex cameras and other antique but still in use classics. Graham might just make the best replacement graflex shutter curtains out there, and we talk about it and look into some of his resto-mods.
check out the homemade camera podcast at Homemadecamera.com
You can check out some of Graham's work at: graflexparts.com facebook.com/graflexparts instagram.com/graflex_parts https://www.facebook.com/groups/grafl... https://www.facebook.com/groups/30285... email@example.com
This is an Audio episode that you can watch as a full video episode on youtube here:
Freeman Lin of instagram @watchmemake fame talks to the guys about his camera mods turning 35mm SLR's into panoramic viewfinder cameras.
You can find some of Freemans work at www.trastic.com.
In this Episode of the Homemade Camera Podcast, the guys talk to Sam Trachsel of Ars-Imago about his homemade 16x20 camera that he has been using to shoot direct color positives.
WATCH THE VIDEO ON YOUTUBE:
The Homemade Camera Podcast: https://www.homemadecamera.com
The Homemade Camera Podcast Facebook Group: https://www.facebook.com/groups/2282531432013144/
This is Sam Trachsel's blog post about the camera on Ars-Imago's blog:
Joe Van Cleave's videos on the process:
CAMERADACTYL's video about the process:
In this episode the guys talk to John Aldred of DIYPhotography.net and youtube fame. John is one of those analog (and not so analog) industry figures that Ethan fealt like he should get to know, but he never expected the breadth and depth of Johns knowledge and stories about venomous snakes. (Hint: there's a great one after the end music).
John writes about trends, products and techniques in the photo and video industry and about technology in general, and is a rare tech writer who will cover smaller and more niche products. It's a little bit of a different perspective than our usual camera-building guests, which was a good thing. John has a deep love of tinkering and it really shows.
Check out Johns writing on www.DIYPhotography.net
and check out his youtube channel at: https://www.youtube.com/johnaldred
In this episode Nick shows Graham and Ethan the camera he has built from a baby speed graphic.
This is our first episode experimenting with recording video. The video is low quality webcam footage and screen shares, but we thought it might be a good starting point to show what we are talking to eachother about. If you are listening on a computer, we recommend watching the episode on Youtube instead.
This is the link: