The Diopter Thread.

[Bold]

Great work TIm!  I added a copy of the spreadsheet to the Lens-cylopedia!

[ken]

I found f-1734 is a good deal, 77mm.  some one said is 0.6 (means from 1734mm).  but the glass is almost flat (heavy, thick ring), compared to my vivitar 1/2, 62mm, very curved.

[Ian Edward Weir]

Hi all,

Inspired by Tito and Bold and their anamorphic Lens-cyclopedia, I decided to try and make a list of low power diopters useful for anamorphic video. Using the info in this thread and searching on the web, I compiled a list which may be useful for anyone looking for suitable diopters.

I've attached the list as PDF. Feel free to comment and/or correct. The list may (hopefully) end up as an add-on to the online Lens-cyclopedia.

Diopters.pdf

Great list! You might want to add the Marumi DHG Achromat Macro Lens 330 (+3) and (+5) Very good quality. Come in 72mm and are achromat doublets. Also a Polaroid 250D Close Up Lens (72mm) which is a +2 achromat doublet. Redstan made a +0.25 achromatic doublet but you might not want to add it to your list being he made 8. I have one and it's incredible. I hope he makes more because when you put it in front of the SRL Magic rangefinder it does wonders  

[ken]

Just got this one http://www.ebay.com/itm/161898434253 , very happy with it. 

It is a new item. Looks like a good deal compare to original price.

[Tito Ferradans]

Well done, man! +0.25 is hard to get!

I have this minolta, it's almost the same as the Tokina +0.4, except it's +0.33

http://www.ebay.com/itm/111827493087

[ken]

Well done, man! +0.25 is hard to get!

I have this minolta, it's almost the same as the Tokina +0.4, except it's +0.33

http://www.ebay.com/itm/111827493087

IMO, that is pricey.

I also bought the SLR's +0.33 &+1.33 set already.  http://www.ebay.com/itm/271994594777

I think they are double element too.

[Tito Ferradans]

I also bought the SLR's +0.33 &+1.33 set already.  http://www.ebay.com/itm/271994594777

I think they are double element too.

they are doublets. my review about them is coming in two weeks.

I bought THE EXACT same ones you did. It was a great price, right? Too low to let it pass for two doublets.

[Andrew - SLR Magic]

Timotheus, we also have a +1.8 Achromatic Diopter in 77mm for our Anamorphot lenses. Thx!

[premini]

4M=+0.25, since 2M=+0.5, 1M=+1, 0.5M=+2....

Im sorry i forgot to give you an update on this. 

I bought one of these for around 80$ and i works! It makes the Isco 54 focus from 1.3m to 4m, which is great!

It also improves the sharpness a bit.

[Timotheus]

Timotheus, we also have a +1.8 Achromatic Diopter in 77mm for our Anamorphot lenses. Thx!

 

Just got this one http://www.ebay.com/itm/161898434253 , very happy with it.

It is a new item. Looks like a good deal compare to original price.

 

I found f-1734 is a good deal, 77mm.  some one said is 0.6 (means from 1734mm).  but the glass is almost flat (heavy, thick ring), compared to my vivitar 1/2, 62mm, very curved.

Hi guys,

Added these to the list. Great finds Ken! Couldn't resist buying that 77mm KMZ diopter on eBay for a steal...was the last one (for now)!

Cheers,
Tim
 

 

Diopters v20151215.pdf

[Tito Ferradans]

Timotheus, we also have a +1.8 Achromatic Diopter in 77mm for our Anamorphot lenses. Thx!

I got that too since I liked the other two so much. hahaha

[redimp]

So is there a way to use diopters to decrease MFD of single-focus attachments? I am using rangefinder and am wondering if i can go below the factory setting by attaching an 82mm diopter in front of it. I am looking to do those eyes-take-whole-frame shots, with 3,55 ratio I need to be around 20 or 25 cm away to pull it off. Considering Rangefinder is a diopter too, what diopter strenght do I need to make it focus that close? I am assuming I'd be able to fine-tune the focus too with focusing the rangefinder with diopter attached.

[Andrew - SLR Magic]

So is there a way to use diopters to decrease MFD of single-focus attachments? I am using rangefinder and am wondering if i can go below the factory setting by attaching an 82mm diopter in front of it. I am looking to do those eyes-take-whole-frame shots, with 3,55 ratio I need to be around 20 or 25 cm away to pull it off. Considering Rangefinder is a diopter too, what diopter strenght do I need to make it focus that close? I am assuming I'd be able to fine-tune the focus too with focusing the rangefinder with diopter attached.

You may get vignetting when using 82mm Achromatic Diopters due to the edge thickness. For regular 82mm filters you need to trial and error.

What you may do is set the Rangefinder to a closer focusing distance then find the sweet spot of your dual focus setup. It helps to bring down the MDF below the rated 3'6 at the expense of dual focusing again but at least you get your eye shot!

[redimp]

You may get vignetting when using 82mm Achromatic Diopters due to the edge thickness. For regular 82mm filters you need to trial and error.

What you may do is set the Rangefinder to a closer focusing distance then find the sweet spot of your dual focus setup. It helps to bring down the MDF below the rated 3'6 at the expense of dual focusing again but at least you get your eye shot!

thanks, Andrew, but I am using a fixed focus anamorphic and when I set rangefinder to MFD and my taking lens closer then infinity, the image is not sharp. So my only option is diopters. 

But you are saying that vignetting apart there should be no problem using diopters with rangefinder?

thanks

[Bioskop.Inc]

thanks, Andrew, but I am using a fixed focus anamorphic and when I set rangefinder to MFD and my taking lens closer then infinity, the image is not sharp. So my only option is diopters. 

But you are saying that vignetting apart there should be no problem using diopters with rangefinder?

thanks

Use a longer taking lens & a +1 or +2 diopter or both!

[ken]

Wow, 138mm. Fits Panasonic LA7200?

http://www.ebay.ca/itm/252191133535

 

 

[Tito Ferradans]

Wow, 138mm. Fits Panasonic LA7200?

http://www.ebay.ca/itm/252191133535

It's waaaay bigger than the Panny's front element. I once had a bunch of 4.5" diopters, but this price is absurd. With A LOT of patience you can find them for $50 or so.

[ken]

I have a Vivitar +0.5 lens, 67mm,  marks as 1/2, as pictures, for sharing info.

[Tito Ferradans]

review of SLR Magic's achromats, I thought it could be useful here.

http://www.tferradans.com/blog/?p=8334

[Tito Ferradans]

http://www.ebay.com/itm/111855621951?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT - Canons, +0.48 and +0.98 and a couple NDs.. I considered getting them myself but I really don't need it.