sippyjug104 Loc: Missouri

The last two wasps were guarding the remains of their nest that they had built on the ladder that I needed to use to change the outdoor lights for the dog yard. When the battle for the ladder was over, the final score was "Sippy-2, Wasps-0".

Never letting an opportunity go to waste, I staged one of them using the 5X measuring microscope objective mounted on a bellows with extension tubes as the optic for the camera.

This microscope objective is "finite" so it needs to be extended a specific distance from the camera sensor for optimum performance and to deliver the rated magnification. Each time that I mount it, I need to extend it to the required distance.

How do I know how long the extension must be? Glad you asked. This objective has a 42mm focal length and it is listed as 5X magnification.

So....The length of extension measured in millimeters from the mounting threads of the objective to the camera sensor is:

Extension = (measured in millimeters)
FL = Focal Lenght of optic
M = Magnification of optic

Extension (in millimeters) = FL * (M+1)
Extension = 42 * (5+1)
Extension = 42 * 6
Extension = 252mm measured from the objective mounting threads to the camera sensor.

(Download)

dpullum Loc: Tampa Florida

You should have shaved the wasp first.

How do I know how long the extension must be? Thank you sippy.. you have given photos of your set up before but the math here is very helpful... Thank you Sippy

I will print this math information and put it in my belows storage box along with the microscope lens. Someday i will get around to using them

ecobin Loc: Paoli, PA

Awesome!

The last time I was stung by wasps (2 summers ago) my hand was swollen for a week and had pain for over a month. Glad you got them and they didn't get you!

dpullum Loc: Tampa Florida

Ecorbin... yep, serious stuff these killer insects. I had a wasp sting on my shinbone and it did not heal properly, eventually perhaps a month or two. Eventually, I took the scab off and gouge out dead flesh with my knife ... Only when the traumatized toxic flesh was cored out did the wound heal. Normally a web of tissue is formed in wounds and the new flesh grows with that structuring. The wasp bite stops the structuring.

"Wasp sting is a relatively common arthropod assault but is sometimes fatal because of anaphylaxis. Rhabdomyolysis is a serious condition, with destruction of striated muscles, and can be induced by various causes such as drugs, heart attacks, CRASH syndrome, and viper bites."
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3505935/

sippyjug104 Loc: Missouri

Thanks, Dpullum and more importantly, I hope that you and yours are safe from the approaching storm. The physics of extending the lens to vary the magnification uses the same formula, just transposing some numbers. The fellows that use the World Class Canon MP-65E macro lens know that when they change magnification, the lens length increases, and this is why.

sippyjug104 Loc: Missouri

Thanks, Elliott. I store my step ladders upright and the underside of the steps makes a good place to keep their nests out of the weather. I learned the hard way to look before moving one of the ladders.

BassmanBruce Loc: Middle of the Mitten

Well if you count the two wasps and the wonderfull picture I’d say Sippy 3, nasties 0.
Nice work, all the way around.

sippyjug104 Loc: Missouri

Thanks, BassmanBruce. I enjoy seeing some of the common things that have always been around me in different ways and share them with others here.

napabob Loc: Napa CA

Another well shot highly detailed image

sippyjug104 Loc: Missouri

Thanks, Napabob. It's always nice to hear from you.

tinusbum Loc: east texas

beautiful stack

sippyjug104 Loc: Missouri

Thanks, Tinusbum. I appreciate your viewing and feedback.