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10-26-2012, 10:36 AM - 2 Likes   #1
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Tele-Wide Optical viewfinder

Here's a silly little project with an old add-on optical viewfinder that I got off eBay. I think it's the finder that was provided with a pair of Lentar conversion lenses. (Just search for "Tele-Wide finder". I got mine for about $US10.)

The goal (if there was one) was a finder I could use with the M28mm/f2.8 when using zone focusing in bright bright sunlight (totally unnecessary, because every time I take my K-01 outdoors, it turns overcast. It's a feature.) I also have a Kaligar finder, but the markings are square and don't match as well to my lenses.

First of all, a K-01 with an OVF.

There. Now it's perfect. Stop complaining.
What do you mean, no optical viewfinder? | Flickr - Photo Sharing!

The scene (kit lens at 18mm):

18mm field of view | Flickr - Photo Sharing!

The view through the Tele-Wide:

What you see through the Tele-Wide viewfinder | Flickr - Photo Sharing!

Tele (kit lens at 55mm): (Was supposed to be an M50/1.7, but I forgot to put it in the bag).

55mm field of view | Flickr - Photo Sharing!

Wide: M28/2.8

28mm field of view | Flickr - Photo Sharing!

The test: (M28/2.8 set to hyperfocal, framed through the OVF, I moved closer to get a branch out of the way)

I didn't even focus... | Flickr - Photo Sharing!

Conclusion:
Yeah, it'll work.


Last edited by THoog; 10-26-2012 at 11:03 AM.
10-26-2012, 11:49 AM   #2
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Job well done!!!
Congrats!!!
10-26-2012, 12:28 PM   #3
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Very nice! I want one for my 50mm!

Can you give a guesstimate on what "mm" the tele one is?
10-26-2012, 01:51 PM   #4
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QuoteOriginally posted by kaiserz Quote
Very nice! I want one for my 50mm!

Can you give a guesstimate on what "mm" the tele one is?
I think it's pretty close to 55mm. For a 50, I'd use the outside edge of the 'Tele' box. For the 40mm or a 35mm, I'd split the difference between the two boxes. After years of not-100% viewfinders and/or sloppy film processors, I'm used to leaving a little extra at the edges and trimming in Post, if necessary.

You have to aim a little low because of parallax, but you quickly get a feel for it. I thought about modifying the mount on the finder to give it a little downward angle - this works okay. A lot of the old finders out there are clip-on instead of hotshoe. I could remove the clip and get a scrap hotshoe... - but that's a project for another day.

10-26-2012, 01:57 PM - 1 Like   #5
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Those are great little finders. I've been using one on my Q with the 01 Prime (47mm) and longer end of the 02 Zoom (80mm.)

10-26-2012, 02:30 PM   #6
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QuoteOriginally posted by crewl1 Quote
Those are great little finders. I've been using one on my Q with the 01 Prime (47mm) and longer end of the 02 Zoom (80mm.)
To give credit where it is due, I think it was one of your Q threads that got me looking at Tele-Wides for the K-01 instead of the more expensive finders (or the bizarre/awesome Zorki turret finders). I just needed a chance to get pictures to "calibrate" (using the term very loosely) a T-W to the K-01. The Kaligar finder (aluminum body, orange coating on glass) looks nice, but doesn't match up as well. The Petri looks like a slightly different design... I haven't tried one yet (no one bid on a Petri for awhile!)
10-28-2012, 04:51 PM   #7
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I was looking at the tele-wides also. But since I have perfect vision with perfect depth perception so I think I'll be picking up an ikodot and giving that a try, I'll be able to swap it with my other cameras.
10-28-2012, 07:42 PM   #8
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The finder with the Yashica wide/tele lens set (55mm mount) is perfect, as it has the rectangular wide tele etching for the 35mm format. The set is pretty cheap on ebay. Do look up ebay India too and some other countries for surprise finds. They come in excellent leather cases too.

10-31-2012, 03:05 PM   #9
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Since I have both Petri and Yashica telewide finders (representing different attacks of GAS over the years), I thought I'd carry the tests one step further and compare them. These two sets of three test shots are with the DA 18-55 lens set to ≈28mm (about halfway between the 24 and 35 marks on the lens) and 55mm, respectively.

Top to bottom, the order is 28mm with LCD, Petri, and Yashica; 55mm with LCD, Petri, Yashica.

In the first set of three, at 28mm, the left edge of the LCD or wide finder frame was set at the left edge of the bright oval door window on the left, and the bottom edge was set at the bottom of the loveseat.

In the second set, at 55mm, I set the left edge of the LCD or tele finder frame at the left edge of the background window, and again, the bottom edge at the bottom of the loveseat.

These locations of the edges show that both finders aim the camera lower than the view and also that they give the camera quite a bit of tilt to the right. The Yashica--my copy, at least--shoots lower and shows the most tilt.

The bases of both viewfinders are attached by screws to the body, so it may be possible to loosen the screws and add thin shims in back or to the left side to lower the field of view or tilt it back to the right to match the actual field of the shot. More experimentation will be required.

Other than that, I prefer the nice yellow lens coating on the Yashica finder, which gives its fine-lined frames a bright, contrasty yellow color. The Yashica's tele frame is square-cornered, and the wide frame is round-cornered. In comparison, the Petri's frames are a broader-lined silver-white, and both tele and wide frames are round-cornered.

The Petri weighs 16g and the Yashica 14g.

Family room decor courtesy of my six-year-old grandson.
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11-01-2012, 06:27 PM   #10
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Bingo! Perfect!

and i still havent bought my K-01. Shame on me. But many thanks for the post(s).
11-01-2012, 06:47 PM   #11
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QuoteOriginally posted by tromboads Quote
and i still havent bought my K-01. Shame on me. But many thanks for the post(s).
Yes, shame! Somewhere, there's a bricK-01 waiting for that zebra Pancolar! Just for that, I shall have to buy the yellow bumblebee at the new reduced price and shoot more LensPorn with weird old lenses!



...Gee, I wish I wasn't thinking about actually doing it...
11-01-2012, 06:52 PM   #12
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QuoteOriginally posted by nparsons13 Quote
Since I have both Petri and Yashica telewide finders (representing different attacks of GAS over the years), I thought I'd carry the tests one step further and compare them.
Nice work! I was avoiding being too precise with my "cali-slopi-brations", since I didn't know if I would be anywhere close to useable FoVs.

I think my "Tele-Wide Japan" finder is very similar to the Yashica.
11-01-2012, 08:12 PM   #13
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tromboads: The price just dropped again today. No excuses now!

THoog: Thanks, but I wouldn't call my examples "precise." I feel guilty because I didn't even use a tripod.

If your finder says "Tele-Wide Japan" on the back, has three lines around it, and has the same yellow coating as crewl1's, above, it's the Yashica.
11-01-2012, 08:39 PM   #14
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QuoteOriginally posted by nparsons13 Quote
I wouldn't call my examples "precise." I feel guilty because I didn't even use a tripod.

If your finder says "Tele-Wide Japan" on the back, has three lines around it, and has the same yellow coating as crewl1's, above, it's the Yashica.
Likewise, because I didn't use a tripod, I dubbed it 'slopibrating' instead of 'calibrating'. I did make sure I stood on the same rock...

Yep, my finder is the Yashica, all right. Looks like they made a jillion of them.

I'm chasing down a Petri finder; I guess I will end up with a pair of Petri conversion lenses as well (would rather have Lentar lenses - they're zebras!). Google has let me down - I can't find ANY good DIY projects for old cheap conversion lenses!
11-01-2012, 09:16 PM   #15
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QuoteOriginally posted by THoog Quote
Yes, shame! Somewhere, there's a bricK-01 waiting for that zebra Pancolar! Just for that, I shall have to buy the yellow bumblebee at the new reduced price and shoot more LensPorn with weird old lenses!



...Gee, I wish I wasn't thinking about actually doing it...
I keep having the internal debate between the black and the yellow honestly. I see all you lot with Black ones and I think to myself. Yes.. yes indeed the black would go nicer with these lenses treating them as if they were shows for peats sake! The Yellow tho. Is just all kinds of silly, and I really tend to get on well with silly

Hovering over buy button.. $80 shipping down here. geeeeeeees.

You last time I was looking at them, I said to myself if I could get the 40mm and body for $500 id do it. Now its here and I'm getting cold feet I was cursing you guys in the states. I'm running out of excuses..

Perhaps if i buy the ladies Christmas presents first I can then make an appropriate decision
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