Topic: To teach is to learn.

During my career as a teacher  i quickly got to understand what the title to this item meant. I thought I had the knowledge about my subject (Biology) and also that I understood the processes going on in plants and animals. However, when I had to teach students about the subject, I found that my knowledge and understanding became greater. Therefore my advice is that if you want to fully understand a topic in photography then try and teach it to a novice. You may be surprised how much you learn as you teach it.

I've been preparing to deliver the topic of Exposure to our beginners next Thursday evening. I thought I knew and understood what exposure was after doing photography for over 50 years, but I've learned a lot of new stuff now.

Remember reciprocity failure? Does it still apply to digital cameras?

Remember D.I.N. and A.S.A? They got replaced by ISO. What is ISO?

Why are STOPS called stops?

Why are f numbers shown as 1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22, 32 etc?

What is noise?

What is Base ISO?

Is sensor size related to noise?

Would you expect images to be noisier in the summer than in the winter?

Why do long exposure become noisy?

Does noise reduction improve the image quality?

There's a lot more too, but that's enough for now to make you think.

P.S. I won't be doing all that with the beginners. I'll give them 50 years to find the answers LOL.

"A great photograph should show you more than you can see".

Re: To teach is to learn.

When my daughter is home we go out together and I teach her photography. It surprises me how much I take for granted by assuming she knows what many of us do.