So what makes a Bolex viewfinder 13x/14x?

[Mana]

Is it just the eyepiece itself? Something internal to the viewfinder? Jean-Louis?

[7OSE9]

Interests me too.
And then I'd like to know if the changes are made also for H8 Rex4.

[Mana]

Luigi, got some answers on this question!

http://www.cinematography.com/index.php?showtopic=69363

[7OSE9]

Thanks! It's important to know that increases the brightness, the usual problem of H Series!

Still, I do not know where, I read that the change can also be done at H8. If someone can confirm, it can write.

[Mana]

Still, I do not know where, I read that the change can also be done at H8. If someone can confirm, it can write.

Well, I'd love to put a 13x viewfinder on my DS8 Rex 4!

[sciolist]

Well, I'd love to put a 13x viewfinder on my DS8 Rex 4!

Jean-Louis Séguin upgraded my H8 RX4 UltraPan8 camera from 10x to 13x. I assume he can do the same with any H8 RX3/4 camera.

[7OSE9]

Well, I'd love to put a 13x viewfinder on my DS8 Rex 4!

Jean-Louis Séguin upgraded my H8 RX4 UltraPan8 camera from 10x to 13x. I assume he can do the same with any H8 RX3/4 camera.

Thank you! I'd like to upgrade my H8 Rex 4 not Ultrapan8, I'll try to do some money count.

A curiosity: if you Increase the brightness of the viewfinder, you can believe to receive more light, then underexpose the film?
With the viewfinder changed from 10x to 13x and more light on viewfinder, there is always the ratio of the deviation of light 80% / 20%?