Traditional Culture Encyclopedia - Photography major - What is the difference between "asking for help" and "asking for help" to buy seagulls?

What is the difference between "asking for help" and "asking for help" to buy seagulls?

First, the images are different.

1, 4A: The image in the viewfinder is upside down.

2, 4B: Look down at the viewfinder, and the image is normal.

Second, the flash is different.

1, 4A: There are only sockets with flashlines, and there is no measurement, so it can only be measured by numbers. Fortunately, the color negative used is more tolerant.

2, 4B: Add a flash socket, which is much more convenient to use.

Third, the lens is different.

1, 4A: It is a 6x6 composition, which is a new field like Hasselblad.

2, 4B: The photographic lens is a three-piece three-group Kirk lens of F3.5, not a MC (single chip).

Baidu Encyclopedia-Seagull 4 dual-lens reflex camera