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07-26-2011, 12:02 AM - 1 Like   #1
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Nikon Right Angle Viewfinder on a Pnetax 67II

I have alternately used the Pentax right angle viewfinder and the 2X eyepiece on the Pentax 67II for some time now, but I have never really been happy with either. One can use one or the other, but not both at the same time. Also, the 2X eyepiece has a lot of geometric distortion and is floppy on the camera, whereas the right angle viewfinder is not as sharp as I would like, and the focussing barrel could use a little more turning resistance.

However, there is a very nice solution! The Nikon DR-5 right angle viewfinder can be fitted onto the Pentax 67II, as shown in the first two photos below. It has a very nice toggle to switch between 1X and 2X, is very sharp in both positions, and has much less geometric distortion, as well as greater turning resistance in the focussing barrel, than the Pentax 2X eyepiece. In 1X mode, the entire picture is visible, as well as the technical information displayed in the viewfinder.

The DR-5 is mounted onto the P67II prism using the Nikon DK-18 thread adapter, which comes with the DR-5, or can be purchased separately. Unfortunately, the unthreaded part of the DK-18 has too great a diameter and will not fit into the eyepiece socket on the P67II, preventing engagement of the threads. This problem is easily solved by turning down the diameter in a lathe, or grinding it off by hand - you can mount it on a drill bit and turn it against a metel file. In either case, be careful not to remove so much material that you damage the outer threads. The DR-5 with the modified DK-18 adapter ring is shown in the 3rd photo below. Note that the lathed part of the DK-18 is shiny. Note also that in modified form, it can still be used on the Nikon D3 series and the D700.

When setting it up. one must first adjust the diopter on the prism of the P67II. Then install the right angle viewer and adjust the focus on the viewer by turning the barrel. This assures that focus is simultaneously achieved in both the 1X and 2X modes.

This DR-5 is the best right angle eyepiece I have ever used and it is a dream come true on the P67II.

Best, Alan

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Last edited by ARCASIA; 07-26-2011 at 03:09 AM.
07-26-2011, 02:47 AM   #2
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most impressive, I will have to look into this.
10-11-2011, 03:36 PM   #3
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I am still looking for the 67 right angle viewer and have stumbled across your thread, Alan. Very interesting. After three months - are you still satisfied with this solution?
Btw, are you sure the adapter DK-18 always comes with a new original DR-5 package?
10-18-2011, 03:59 PM   #4
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I ordered the DR-5 and it does come with the DK-18. BUT: I just can't make it work. The diameter of the adpater is too small (about 21mm) for the socket of the 67II eyepiece (about 22mm). I don't want to damage anything so can anyone recommend a professional who does this kind of work? Resp.: who can "produce" an adapter that fits into the socket?
Let me know, please. I am about to send this back to the dealer but maybe I am too hasty.

10-22-2011, 11:28 PM   #5
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Hi,

Patience my dear fellow. No need to be hasty. The only thing that must be modified is the DK-18 adapter - not the DR-5 , the Pentax 67II nor any other camera you may use it with. I thought I explained it well in my post but I will elaborate further. Without the adapter, the thread diameter on the DR-5 is too small for the 67II. However, the DK-18 has just the right thread diameter. The problem is that the receiving threads on the 67II are recessed, and the diameter of the recess is not big enough to accept the unthreaded part of the DK-18. Thus the threads on the DK-18 are prevented from reaching the receiving threads on the 67II. The unthreaded part of the DK-18 is meant for grip - this is the part of it that must be milled down to a diameter smaller than that of the viewfinder recess diameter on the 67II. When finished and installed on the DR-5, it looks as shown in Figure 3 above. Once turned down sufficiently, the modified DK-18 should fit into the 67II recess with a little room to spare.

The DR-5 with the modified DK-18 installed can then be used on either the 67II or on the Pro series Nikon cameras (D3, D700, etc.). Removal of the modified DK-18 from the DR-5 is now a little more tricky, since the grip has been machined off - I use a small pipe wrench gripped onto the machined surface of the DK-18, though with some care, a vise grip may be equally effective.

I brought the use of the DR-5 on the 67II to the attention of this forum because accurate focussing is always critical and this is by far the best solution I have ever used. If you can get it to work, I am sure that you will be very happy also.

Best, Alan
10-22-2011, 11:35 PM   #6
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Yes, still very happy. In fact, I almost always use the right angle finder because of the improved focussing, even though it may be inconvenient to do so.

Best, Alan

QuoteOriginally posted by phonoline Quote
I am still looking for the 67 right angle viewer and have stumbled across your thread, Alan. Very interesting. After three months - are you still satisfied with this solution?
Btw, are you sure the adapter DK-18 always comes with a new original DR-5 package?
10-23-2011, 03:13 AM   #7
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Hi Alan,
thanks for the explanation. I still don't get it. . Must be a language problem, or something else on your 67II is different than on mine. I got a DR-5 with the DK-18. I removed the eyepiece from the 67II (which is just a protection glass, not a "hood"), its threaded part is slightly bigger (I guess it'd be around 22mm) than the threaded part of the DK-18 (around 21mm). This is where the problem starts. To screw the DK-18 into the place where the eyepiece once was doesn't work as the diameter of the threaded part of the DK-18 is too SMALL. From what I can see it has nothing to do with any kind of recess.
Also, you talk about the unthreaded part of the DK-18. Isn't that the part you use to screw on the DR-5?

Man, I am sorry, this is all confusing. I read this thread, bought the DR-5, tried to get it onto the 67II, didn't work, sent it back.
11-30-2012, 10:35 PM   #8
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have to admit something to this post.
First of all DR-5 doesn't comes with Nikon Dr-18 adapter! I bought original one from Amazon priory contacted seller and he told me that there are no adapter included therefore I bought it separately on e-Bay.
I was excited by the info I've got on this post and was for 100% sure that this is true,reliable and trusted info. But-it wasn't unfortunately!
When both items arrived and I tried to assemble them by trembling heart (literary!) none of those units didn't fit together!
Adapter ring didn't fit into Pentax eyepiece as it is TOO SMALL contrary the claim of the author of this post! So there couldn't be any reason to talking about grinding as the diameter must be expended! Both items-adapter ring and viewfinder were original as I says and made in Japan so there can't be any suspicions they were made in China!
So there are some questions to ask to the author of this post! Was it misleading information or some 'mistake' with following 'I'm so sorry' which I hate indeed!
I do not care about 20 EU I lost on adapter ring! I am mostly bothered of my upcoming project what now is in danger and will bring a lot of conversations with my clients! It is all about the time and reputation!
I have to warn all the folks from such a home-growing 'experienced specialists' who are showing up like a sages in area where they are just a hobbysts!
I am so sorry for I was was forced to put it here in public,but had to!

12-01-2012, 01:00 PM   #9
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With all the fitting problems, why bother? I mean you can't you put a waist level finder (aka folding hood) on the 67II? And get even better critical focus at 8x and a 100% view.
12-01-2012, 05:17 PM   #10
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QuoteOriginally posted by tuco Quote
With all the fitting problems, why bother? I mean you can't you put a waist level finder (aka folding hood) on the 67II? And get even better critical focus at 8x and a 100% view.
All what we are doing have a certain logics and purpose. Since waist lever finder costs up to 200EU on e-Bay and DR-5 the same it is clear that from point of view of savings it is better to invest in one viewfinder what fits in 2 different cameras - in my case it is 67II and D700. Hope it is clear enough.
12-01-2012, 05:31 PM   #11
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Right angle finders are notorious for the very severe damage that will be caused to the viewfinder integrity in the event of a solid bump, and not necessarily a drop. I have used a right angle finder on my Canon EOS 1N for 12 years now and frankly, it's a bloody annoyance, but necessary due to age-related deterioration in eyesight. The Pentax 67II shares an identical eyepiece thread to the earlier 67 and 6x7 viewfinders. I agree with tuco on the alternatives available without introducing such an annoying accessory which predisposes the camera to potential damage, storage and transportation foibles.
12-01-2012, 08:59 PM   #12
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QuoteOriginally posted by Sunny Cloud Quote
All what we are doing have a certain logics and purpose. Since waist lever finder costs up to 200EU on e-Bay and DR-5 the same it is clear that from point of view of savings it is better to invest in one viewfinder what fits in 2 different cameras - in my case it is 67II and D700. Hope it is clear enough.
Ouch, the WLF is that expensive? I got both of mine for around $80 USD.
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