models.py

from django.db import models

class product_commonPhoto(models.Model):
    photo = models.ImageField(upload_to="images")
    product = models.ForeignKey('product_Camera')


class product_commonInfo(models.Model):

    price_opt = models.FloatField()
    model = models.CharField(max_length=255)
    description = models.TextField()

    class Meta():
        abstract = True

class product_Camera(product_commonInfo):
    pass