danaher_dempsey__jr.

For head shots with the 150mm f/4 lens you need to use the 18mm extension tube or perhaps the 1.4 X magnifier. 150 x 1.4 = 210mm.... best plan is the 18mm extension tube.

Excellent points about depth of field with 6x7 format. Consider the 35mm camera using 85mm f/1.8 for subject isolation in portraits, the 6x7 portrait lens is often a 150mm f/4. Note that Bronica GS-1 was built to be a lighter 6x7 than Pentax and Mamiya. All lenses are leaf with maximum speed of 1/500 and the lenses are slower f stop which keeps the lenses lighter and smaller. Fastest lenses are 80mm f/3.5 and 100mm f/3.5. The 150mm is equivalent to 75mm and the 200mm is equivalent to 100mm neither is particularly close focusing thus an 18mm extension tube is used for close headshots.

<p>It may be that those Mamiya Z series lenses are of good quality and are orphaned by poor camera bodies…. so would they be a good purchase for Mirrorless systems and adapters? I tried the 50mm Macro on a Nikon V1 and was pleased.<br> -- Dan Dempsey</p>

<p>I will be moving to Arizona near four-corners. I would like to know the pros and cons of using a Mamiya Cabin 67-Z slide projector with 6x7 slides vs a digital projector with 24 mpx images from a Pentax k3. Landscape photos are the most likely subject.<br> I have both 6x7 and 645 film cameras. I will need to buy a projector. Any thoughts on the screen image differences?<br> -- Dan</p>

<p>I have an RF645 which I bought 2nd hand some years ago. The film advance mechanism was a problem on many of these. Things were fine for a while but ..... Eventually on mine the film would not advance. I sent it to Tamron/Bronica service in New York and all is fine now. If you like film this is a really nice camera.</p>

<p>I have a Bronica GS-1 and a Polaroid Film Back G.<br> Is there any way to use this back with any currently available instant film?<br> <br />If so what modifications to the film back are needed?</p>

<p>Completely off task here .... but Pentax K-mount and current Pentax in body stabilization means all lenses from Pentax A lens forward have both metering and shake reduction. As to what that will mean in sales volume for the coming in 2016 Pentax Full Frame digital SLR I have no idea. Has Ricoh saved Pentax? Time will tell. Ricoh is now introducing more Full Frame lenses.</p>

<p>The above conversation has me thinking ..... I have a Bronica GS-1 and a Polaroid back attachment. I have never used the Polaroid back. Now I am interested. What film would I use for this Bronica GS-1 6x7 camera's Polaroid Back?</p>

<p>The 645 for the road.....<br> Look at Bronica rf645 ... the medium format rangefinder. For portraiture the standard lens should be fine. Very compact and easy to carry with good glass.</p>

<p>The GS-1 metered Rotary Prism is often available at a reasonable price on eBay.<br> There is also a hard to find GS-1 tripod attachment, which rotates the camera from vertical to horizontal.</p>