A few from February South London

Dicyrtomina saundersi From the garden, The real size is 1.67 mm, magnification is 3.78

IMAGE LINK: https://flic.kr/p/2kGr​HG2

IMAGE LINK: https://flic.kr/p/2kGo​aup

IMAGE LINK: https://flic.kr/p/2kG1​FwS

IMAGE LINK: https://flic.kr/p/2kGJ​N64

IMAGE LINK: https://flic.kr/p/2kGJ​Q3W

IMAGE LINK: https://flic.kr/p/2kB7​NCP

Good ones davholla

Brian V.

davholla wrote in post #19203934
Male fly, The real size is 3.07 mm, magnification is 2.1

IMAGE LINK: https://flic.kr/p/2kGJ​N64 IMG_7532Fly by davholla2002, on Flickr

Didn't know flies have such nice hair . great pictures.

Nice shots. You are doing something I have been trying to do ... real size and magnification. Are you taking the magnification and then calculating the actual size or are you finding something buried in the EXIF that I have not yet located. I never believe distance info in the EXIF. Any hints or tips welcome.

ECC233 wrote in post #19204150
Nice shots. You are doing something I have been trying to do ... real size and magnification. Are you taking the magnification and then calculating the actual size or are you finding something buried in the EXIF that I have not yet located. I never believe distance info in the EXIF. Any hints or tips welcome.

I can only do this with Canon MPE65. The magnification is stored and then I have a program that calculates it from there.
This is the python code I use but the maths should make sense for people you don't know python

Magnification = float (input("Magnification "))#ask the user for the magnification and change it to a number
Tele = float (input("Teleconverter "))#ask the user for the teleconverter and change it to a number
Magnification= Magnification * Tele #work out the magnification
Image_size =float (input("Image_size "))#get the size of the image before croping
Creature_size =float (input("Creature_size "))#measure the creature size on the image
Sensor_size =22.2#canon 40 is 22.2 mm sensor
Real_size = (Sensor_size/Magnifica​tion)*(Creature_size/I​mage_size)#calculate the size
Real_size = round(Real_size,2)
Str_Real_size = str(Real_size)
print ("The real size is "+ Str_Real_size + " mm, magnification is " +str(Magnification))

Many thanks. I'm quite happy in Python ... I'll see if I can kludge anything for Sony. Just one question -"Creature_size =float (input("Creature_size "))#measure the creature size on the image" is this in pixels or mm? I guess the latter, but how do you get this value?

Thanks again

ECC233 wrote in post #19204164
Many thanks. I'm quite happy in Python ... I'll see if I can kludge anything for Sony. Just one question -"Creature_size =float (input("Creature_size "))#measure the creature size on the image" is this in pixels or mm? I guess the latter, but how do you get this value?

Thanks again

It is in mm. I get it from gimp I use the measure tool to measure the size of the creature.

This is a better description that mine
https://www.davidkenna​rdphotography.com …-from-a-macro-photo.xhtml

If you want the full python script I will post it.

davholla wrote in post #19204168
It is in mm. I get it from gimp I use the measure tool to measure the size of the creature.

This is a better description that mine
https://www.davidkenna​rdphotography.com …-from-a-macro-photo.xhtml

If you want the full python script I will post it.

Thanks a lot

The script would help a lot .. you can pm it if you don't want to post

Cheers

ECC233 wrote in post #19204185
Thanks a lot

The script would help a lot .. you can pm it if you don't want to post

Cheers

No problem here it is

Magnification = float (input("Magnification "))#ask the user for the magnification and change it to a number
Tele = float (input("Teleconverter "))#ask the user for the teleconverter and change it to a number
Magnification= Magnification * Tele #work out the magnification
Image_size =float (input("Image_size "))#get the size of the image before croping
Creature_size =float (input("Creature_size "))#measure the creature size on the image
Sensor_size =22.2#canon 40 is 22.2 mm sensor
Real_size = (Sensor_size/Magnifica​tion)*(Creature_size/I​mage_size)#calculate the size
Real_size = round(Real_size,2)
Str_Real_size = str(Real_size)
print ("The real size is "+ Str_Real_size + " mm, magnification is " +str(Magnification))


Just save it as Mag.py and then run it.

Nice ones.