infrared with pentax 67

[giovanni_russo2]

I would like to know whether it is possible to use infrared film with Pentax 67II. Some cameras cannot use infrared as they have an optical system to count the photograms which exposes the film. It seems to me that also the 67II has some optoelectronic device.

Can anyone help me?

Thank You very much.

Merry Christmas and happy 2002 to everybody.

Giovanni

[rolf_strasheim]

I am not aware of any optoelectronic device on the 67II. I use Konica

infrared film in both of my 67II bodies and have never had any

fogging issues.

My only complaint is that nobody makes 220 infrared film!

[steve_rasmussen]

Pentax has a long standing consideration for using infrared film in

their 67 line. The lenses all have infrared focus marks; even the 55-

100 zoom has them, even though there are no hyperfocal marks for DOF.

Several of the old pamphlets have pictures taken with infrared film.

Since the zoom has those marks and was designed around the time of

the intro of the 67II, it makes sense that the 67II can shoot

infrared.

[giovanni_russo2]

Thank You, Steve and Rolf. I will immediately start shooting one or

two infrared films. I was suggested to use Konika infrared with B&W

filter 092. Of course, any other suggestion will be welcome.

Giovanni

[gene_crumpler8]

Try MACO 820 film in your Pentax. It is slow, but in my experience,

gives better results than Konica. I use either an R72 or 87 filter

with an EI of 4 and develop in Diafine, 3 minutes in both the A and B

solutions. You will get suprisingly good 16 x20 prints from this film.

 

<p>

 

Also, there is a guy on the Web that sells Kodak HIE in 220 rolls for

$25 each. He cuts down perforated 70mm HIE and puts it on 220 backing.

Do a search for Rollin Elliot, Infrared Film. I don't have his URL

handy.

[cjtower]

This is a bit of the subject of this thread, but it still seemed like

the place to put it. I too was looking to do infrared in the Pentax

67. I would probably use my favorite lenses, 45mm & 75mm. By

chance, both use the same, BIG, 82mm filter. Infrared filters are

notoriously expensive, and all but impossible to find use. It was a

shock just seeing the prices for a 58mm or 62mm filter. When I

looked into it, many filters seem to have 72mm as the largest size.

I couldnt find, not in stores or on the web, a Hoya RM72 or RM90 in

82mm (in 72mm they are a whopping $260 + $395 respectively!). Am I

missing something? In 82mm, only B+W lists infrared, but they are

not their true infrared filters (the Tiffin 87 is, apparently, no

longer available). My questions are: (1) Does anyone know of a good

source for the filters, or any place that might have used ones? (2) I

sometimes see cheap, or cheap compared to new, prices for old Kodak

square Wratten, which are, I think, 3" or 4" square. If they are 4",

then that would put them around 100mm. Does anyone know if there is

a shop or craftsman who could cut the filter and get in in a 82mm

ring? Just looking for a cheaper way to do this, if possible. I

have standard b&w filters, but want to use something from the opaque

end of the spectrum. Any information or feedback would be

appreciated. I might be able to step from 82 to 72, but don't want to

buy a really expensive filter if I lose image area doing so.

[giovanni_russo2]

Thanks to all. The answer by Gene gives me the opportunity to put

another question concerning the system to name filters. Is there any

universal way to indicate the color of a filter and its intensity ? I

cannot find which kind of red filter Gene suggests, as Heliopan,

B+W, etc. use different way to name their filters.

By the way, can anyone comment about the quality of heliopan filters

comparad to Hoya and B+W?

Thank to anybody wanting to answer

Giovanni

[cjtower]

Anyone interested in shooting the Konica infrared film might want to

compare their filters against the data sheet for Konica's IF750 film -

which is included in the film boxes, and might also be available

online somewhere. This is high red film, not true infrared film. I

have found the most appelaing results with deep orange and standard

red filters. If you move too far up the infrared range (start using

truly opaque filters, you quickly begin to block out the light which

registers on the film! Since this film isn't true infrared, I have

not found any damage to it by autofocus cameras (I have the old P6x7,

so cant comment on the original question here). In fact, I have a

friend process this konica stuff in a converted Noritsu machine which

uses infrared sensors! No damage of any kind. This is tough film,

and it is quite forgiving. It has become my favorite film to use.

Purists might want something higher on the NM chart, but I am really

impressed with this stuff. Konica's best product; better than

Impressa 50.

[gene_crumpler8]

I purchased a 3x3 Lee 87 filter for $12 and cut it to fit inside my

77mm skylight filter for use with my 55 f4 and 200 f4. The r72 filter

is a 52mm Hoya ($32) that I use on my Hassie and Mamiya c33.

 

<p>

 

Maco 820 does not produce an ifrared effect with visible light filters

such as 25A.

[keith_davison]

I would warn anyone thinking of using cut down Kodak 70mm Aerographic infrared in the 67 MkII that the format change pin hole in the pressure plate transfers strongly to the negative due to the lack of an antihalation layer in this film. This only affects 220 of course, but since I have found that you have to be very careful about light levels when loading, 220 makes sense for field trips. Konica (120 only), works perfectly in the 67MkII with an 87 filter, but without the lovely "Kodak" effects unfortunately.

[nate_ross]

<i>Maco 820 does not produce an ifrared effect with visible light filters such as 25A</i>

 

Yeah it does. This was a one second exposure with a red 25. I know it's a pretty crappy shot, but it was my first frame with 820, and I didn't take much time when printing it.

[nate_ross]

My last post probably would have made more sense if I had included the image: http://nira.detatch.org:60/noss/albums/random/first_infrared.jpg