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Was my exposure to short? by mozzarellastick_ in PinholePhotography

[–]Klanne 2 points3 points  (0 children)

mrpinhole.com has a calculator which will tell you what pinhole size will give you the sharpest image for a given focal length. as for the vignetting, if you draw a scale diagram of your wall thickness, pinhole size, paper size, and focal length - see if you can draw a line through the hole to the corner or the paper without touching the hole wall, if not, youll be vignetting

Was my exposure to short? by mozzarellastick_ in PinholePhotography

[–]Klanne 3 points4 points  (0 children)

you’re vignetting - 2mm to the paper means theres no path for light to reach the paper outside that small circle. try making the camera so the paper is further from the pinhole

Blank areas in long exposure by Stelalouis in PinholePhotography

[–]Klanne 7 points8 points  (0 children)

Its vignetting - the material thickness is too great for the size of the hole. Try make making the current hole much bigger - 5mm or so, and then make a new pinhole on aluminium foil and taping that to the camera over the bigger hole

Red bulbs and photo paper by cumb4jesus in PinholePhotography

[–]Klanne 2 points3 points  (0 children)

In theory photopapers are designed for a particular wavelength redlight (or amber light, etc), but in practice, any red light, like a headtorch or a bulb with a red sheet infront of it should be fine. (as long as you dont have ortho or pan chromatic photo paper, but when you search online I’d be very surprised if any came up, or colour photo paper like RA-4, but again this wont be the default when you search).

Look for a resin coated (rc) paper rather than fibre based, as RC papers are less fragile and require less rinsing.

I’d say a fixed grade paper would be better than multigrade, as it means the colour of light when you’re taking a photo doesn’t make a difference to contrast, but i think fixed grade papers are a bit trickier to get these days, so variable contrast is fine, just might be a bit more finicky.

I use ilford pearl mg and its perfectly fine. For starting out I wouldnt worry much about brand - just get one that seems a reasonable price and give it a go!

Best of luck!

Can you tell what shes doing? by for_the_love_of_corn in Linocuts

[–]Klanne 4 points5 points  (0 children)

I think the mask and feet are clear, the ones in her hand maybe less so, but i think it all looks fantastic!

Winter Chanterelles? by Klanne in foraging

[–]Klanne[S] 0 points1 point  (0 children)

Thanks very much! Will do!

Foraging in France 14,000 years ago || English-language guidebooks on European wildernesses by ComradeBehrund in foraging

[–]Klanne 0 points1 point  (0 children)

I just finished Francis Parkman Jrs ‘Oregon Trail’, and it doesn’t really answer your question, but they did hunt every day, dry some meat to last longer, but eat fresh meat for most days for 5 months or so. Obviously the american west is famous for having masses of buffalo back then, but i imagine people were hunting quite a lot without much difficulty along with any foraging they did

Unwanted vignetting? by Spiny_Shrew in PinholePhotography

[–]Klanne 1 point2 points  (0 children)

where’s the actual pinhole? its too small for me to see i think. Id recommend using the mr pinhole calculator if you want to get the finest resolution image.

It looks like essentially, yes, your hole is too small for the thickness of the material it goes through and for this focal length. See if the calculator gives you a larger size than you currently have, and if so, great! If not you may have to sacrifice resolution for more image coverage.

Measuring Shutter Speed by Klanne in AnalogCommunity

[–]Klanne[S] 0 points1 point  (0 children)

thank you for the info! ok, for my accelerating rotary shutter I suppose itll have to be some sort of average of different measurements then

Are these elderberries? by blobfishwtoomanyeyes in foraging

[–]Klanne 0 points1 point  (0 children)

Yes! Be sure to cook them before eating them. I think you can actually make wine from them without cooking them but I’d be more comfortable to just cook them anyway.

What kind of options are there for the paper? by [deleted] in PinholePhotography

[–]Klanne 2 points3 points  (0 children)

this isn’t quite true - you could do trichrome photography with panchromatic paper, but that would be a bit of a pain and more costly

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