This sample pack includes 10 stainless steel pins of each of the 10 sizes we offer so you can find out which work best before buying hundreds; ideal for small to large insects.
Besides pinning insects, these pins are handy tools for teaching physics of optics. Use them to make pinhole cameras & find which sized aperture works best.
We've offered Czech made stainless steel pins since 2005. Entosphinx stainless steel pins are 316 grade stainless steel with a nylon head; protect your valuable collections whether they're insects or textiles. Buy just a few & our delivered cost beats "free" shipping!
Google Reviews, click on the names to see in full: Alison B.: ...ordered a sample pack of insect pins for making pinhole cameras....wonderful selection and super-fast shipment...… Mary C. B. ...Indigo Instruments entomology pins...in my artwork for almost ten years now, and a big part of my studio practice!
Suggested Pin Diameters for Optimal Focus (focal length) for Pinhole Cameras
Focal Length cm
Focal Length in.
Pin Size
Pin Diameter mm
3.5
1 ¼
000
0.25
5.6
2
00
0.30
6.9
2 ½
0
0.35
9.0
3 ½
1
0.40
11.4
4 ½
2
0.45
14.1
5 ½
3
0.50
17.0
6 ½
4
0.55
20.2
8
5
0.60
23.4
9
6
0.65
Focal Length as defined here is the distance from the pinhole at the front of the camera to rear where the photographic film or paper is placed. This is the distance of best theoretical focus of the pinhole camera's image with a pinhole of particular diameter.
The actual pinhole size/aperture made with a particular pin will likely be slightly larger than the diameter of the pin shaft. A small diameter pinhole has a shorter effective focal length; however smaller diameter pinholes will also require longer exposure times than larger pinholes. Depending on your photographic/artistic goals (ultra-sharp focus may not be required, or even desired) you may wish to choose a larger pinhole and give up some sharpness for faster more practical exposure times.
Information provided courtesy of Dan Pickard, Seattle WA
Documentation
Certificate of Analysis
Entosphinx stainless steel pins are made from 316 grade stainless steel which has a minimum of 0.36% molybdenum (Mo) for superior corrosion resistance. This Certificate of Analysis is our guarantee of truly rust resistant insect collection pins.
Reviews (1)
2019-12-17
This was my first time with Indigo Instruments. Quick service. Great products. In this case, stainless steel insect pins. I'm glad I got the sample pack because I found the right size I wanted and it helped me with my next purchase. Way to go Indigo!
— TK
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