[Answered ]-Is there a way to access a model field from its corresponding model form field?

It shouldn’t be accessed at all. The form consists of initial data and cleaned data. If you refer to initial data, use instance. If you need value after user’s action, call is_valid or full_clean and later look for value in cleaned_data. Everything in between is hacking.

If you want to perform any special cleaning on img_form.image, create clean_image method, but you’re probably aware of that already.