peterlove

Thank you for the reply, I am using a Mamiya RB67 pro SD and my metering is by handheld meter, I also use the Cokin filter system I already have a circular polariser and I have just found a linear polariser on ebay, so, I will be making some comparisons. Thanks again. Peter.

Hi all I understand that it is not ok to use an analogue polariser on a digital camera but is it ok to use a circular polariser on film ?. Peter.

That's great to see this post I also have a Cokin P set of filters and holder I will be using them on a 65mm lens on my RB67 pro SD I have also hacksawed the two front slots off of the holder, so, going on what you say in your post I should be more than safe from vignetting when I photograph the sunrise on the longest day 2022. Regards Peter.

Ben, thank you for taking the trouble to look into the loose 90mm lens problem, all your observations and checks noted, my camera is the Pro SD version and all of my associated lenses and any other accessories are for that model, all lenses are K/L type, I have had my suspicions about the 90mm lens ever since I acquired the RB67 a couple of years ago, I noted that the chrome collar nut that secures the X terminal had a damage mark revealing the brass where a tool had slipped during tightening, I have now looked more closely and found that the large collar nut down passed the rear lens had marks also, on checking this I found it had not been tightened securely, the lens now has less movement than before, however, I am not entirely happy that whoever opened the lens had the skills to make a good job, I have used the lens in the passed and the resulting pictures look ok to me, however, I think I will be looking for a replacement lens, I have my eye on a 65mm K/L if I buy that it will be an addition to my collection and I can make some comparisons. Once again Ben thanks for your reply and help. Peter.

Hello, this is my first shot at posting on this forum, I have an RB67 Pro SD and three lenses, 90mm, 127mm and 180mm, ( all K/L type) the 127mm and 180mm fit snug and perfect when the collar is tightened, the 90mm after tightening the collar is not pulling down tight even though the collar is turned to its stop, visually I can see no mechanical reason for this, I should add that I am a retired Volkswagen technician and I well understand things mechanical. Peter