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Forum: General Photography 01-30-2019, 08:21 PM  
Film Developed 64 years after being in the hot ATTIC
Posted By pcrichmond
Replies: 16
Views: 1,064
Great piece:) Makes me want tp play with an old 8mm or super again.
Forum: Sold Items 01-04-2019, 05:17 PM  
For Sale - Sold: Sigma 24-60mm f2.8 EX DG
Posted By pcrichmond
Replies: 4
Views: 821
This is a great lens. One of two AF zooms that I own as I shoot mostly with vintage primes.
Never been disappointed with the results the 24-60 has given on the K1 when I needed a zoom.
Forum: Pentax SLR Lens Discussion 01-04-2019, 05:13 PM  
Steinheil Munchen Cassarit 50/2.8 - Mount?
Posted By pcrichmond
Replies: 8
Views: 511
@Docrwm, A couple standard shots with the Steinheil. OOC converted to jpg with no hood or filter. Green button shutter set and AF button confirm with center spot focus. Not the most scenic but will give you an idea of IQ and OOF areas.
Forum: Pentax DSLR Discussion 01-03-2019, 04:15 PM  
Pentax camera's good for ultraviolet photography?
Posted By pcrichmond
Replies: 7
Views: 678
Definitely. Only problem for me is affordable dedicated UV lights only go down to about 365nm, most in the 380nm to 395nm range. Fortunately I have a mineralogist friend with access to other wavelengths and was able to test my Steinheil and Lensbaby with those. I use the 365nm light a lot with the U360 or BG3 filter and a modified flash or straight sun with the U340. Found the filters aren't that expensive if I stay with 52mm or smaller - much cheaper than buying lenses only to find out they don't transmit that well since I prefer to hand hold shoot. There was a seller on ebay (uviroptics) who had good quality filters for a reasonable price, don't know if they are still listing.
Forum: Pentax DSLR Discussion 01-01-2019, 08:04 PM  
Pentax camera's good for ultraviolet photography?
Posted By pcrichmond
Replies: 7
Views: 678
Sorry for the delayed response but you folks have the idea. I use a pinhole cap on my converted camera and then shine a specific bandwidth light on teflon behind the lens I would like to test for UV transmission. The clearer the image the better the transmission, the more purple or muddier haze the worse transmission. Also by calculating time of exposure gives an idea of transmission potential.

My thought for testing a non converted *ist would be to use a pinhole with a specific filter set in front and then try in sunlight or with a known bandwidth light and measure exposure time. This might give us an idea how sensitive the hotmirror in that older camera actually is. Even if it cuts a fair amount of UV it might still be possible to use on a tripod with longer exposures (instead of handheld) with out converting the camera.

Here are a couple of links for accidental UV lenses:
Lenses for UV; a study comprising some 50 lenses (wide, normal) - Nikon Zone - Fotozones
Ultraviolet Photography

These folks are a wealth of information and I find their sites to be a "go to" when I'm facing more questions than answers.
Forum: General Photography 01-01-2019, 07:46 PM  
Needing a challenge - UV340
Posted By pcrichmond
Replies: 4
Views: 574
Great stuff. I only did one little spurt with visible fluorescence. Should get myself motivated to try some more, could be a fun project for a cold winter day. Think I still have some Testor fluorescent paint in the art supplies somewhere.
Forum: Pentax SLR Lens Discussion 12-29-2018, 07:33 PM  
Steinheil Munchen Cassarit 50/2.8 - Mount?
Posted By pcrichmond
Replies: 8
Views: 511
Here is a link from that lens with UV, all handheld and shot at 5.6. Needing a challenge - UV340 - PentaxForums.com
I'll try and get out sometime in the next few weeks and do some straight color shots for you.
Will send you a pm when i get something uploaded.
Forum: Pentax DSLR Discussion 12-29-2018, 07:30 PM  
Pentax camera's good for ultraviolet photography?
Posted By pcrichmond
Replies: 7
Views: 678
Interesting chart, somehow I'd missed that on the kolarivision page.
I have a K-01 and K1 both converted to full spectrum, mainly for IR but have been starting to get into UV a bit.
My first digital was a K10d so not sure how the *ist performed but do remember reading that they were capable of some lower end IR work so the hot mirror might have passed enough UV for the higher end there also. Would be curious to see if anyone else has tried these older Pentax and can give some feedback

The issue I've had most with UV is finding lenses that transmit UV at 50% or more. Most modern glass (age of autofocus forward to modern) is designed so well that UV cut filters are not needed much anymore. I'm using both 340 and 360nm filters in front of lens and stacked with either the bg40 or s8612. So far I've come across only four of my lenses that transmit at these wavelengths (50mm Steinheil /340, 35mm Zeniton /360, 50mm Domiplan /360 and Lensbaby Soft Focus Optic /340) all are very basic glass to element ratios for lens designs. I do a pinhole test to determine if a lens might have good UV transmission. Wonder if the same could be done with the *ist to see how much UV the older hotmirror passes?

Would love to hear more of what you come up with. This is a new learning curve for me, so appreciate any extra insight others come across.
Here is a link to a few shots in340 with the Steinheil - Needing a challenge - UV340 - PentaxForums.com
Forum: Pentax SLR Lens Discussion 12-27-2018, 10:02 AM  
Steinheil Munchen Cassarit 50/2.8 - Mount?
Posted By pcrichmond
Replies: 8
Views: 511
My version is of the zebra design, base end and focus ring end with silver aperture ring. Has rear pin and "Autom" switch next to aperture ring, also has shutter cable release port in base ring. M42 mount.
Love using it, especially for UV work. It is reported to transmit UV down to 320nm and I have been able to focus past 10 feet hand held at UV340nm. Might actually be a case for UV/IR blocking filter with standard color work - though I haven't bothered and still enjoy the results.
Forum: General Photography 11-02-2018, 11:12 AM  
Where would you go in US around December-March for photo trip?
Posted By pcrichmond
Replies: 58
Views: 1,602
I'll give a +1 for @AstroDave's suggestion of Death Valley. I live a couple hours away from the park and go there often in the winter for desert photography. Many photographic landscapes are accessible via roadside or a short 10-30 minute hike. Also a few hours north of Vegas going toward the Death Valley region are a few old ghost and semi-ghost towns that are fun to photograph.
If you're interested in Dark Sky for night work, this region of Nevada is noted for such.
And depending on how much water we get this winter, the desert flowers in spring can be phenomenal. The park does get crowded during this time if there is a good bloom season.

I must admit that when I get tired of the desert environment, Georgia and Louisiana offer a completely new world. Every trip I've made to Georgia from the swamps to the old gold country has left me in awe.
Forum: Pentax SLR Lens Discussion 11-01-2018, 01:57 PM  
M42 lens app setting
Posted By pcrichmond
Replies: 14
Views: 564
A nice bit of information and thanks.
None of my M42 lenses have the A/M switch (all 3rd party), so this will be good to know for future purchases.
I have a couple with pin only (can be a pain for focusing) and a few more with dual aperture rings & no pin or switch. The latter I find easier to work with though I know there are others who prefer a simpler method of closing down.
Thanks again.
Forum: Pentax SLR Lens Discussion 11-01-2018, 08:52 AM  
M42 lens app setting
Posted By pcrichmond
Replies: 14
Views: 564
A couple of quick questions, does the lens have the A/M switch as @stevebrot mentioned or does it have the pin in the back?
(If it has the pin this must be pushed in by the adapter or a work around.)

Is your ISO set to auto?
I don't have the K5 but on my K1 in TAv mode my meter will stay in the middle exposure no matter the shutter/fstop combo until the ISO is out of a parameter for the correct exposure.
With this mode I can also adjust the meter/exposure with the EV button.
Forum: Pentax News and Rumors 10-19-2018, 10:19 AM  
Thought this might be of interest for Macro
Posted By pcrichmond
Replies: 1
Views: 981
Had this sent to me today in photo newsletter I get.
If true, this could be a nice welcomed addition from Irix to the macro community, especially in K mount.

Irix goes long with their new 150mm f/2.8 1:1 macro lens - DIY Photography
Forum: Pentax Full Frame 10-19-2018, 10:10 AM  
K-1 for filming. Which Gimbal?
Posted By pcrichmond
Replies: 6
Views: 716
Thanks for the update and let us know how this works for you. Paying a higher price is always worth it if the quality and future use options are there.
Not planning on moving over to video myself, I love my stills too much: but am always looking at learning and expanding my horizons for my personal gain.
Give us the pluses and minuses you come up with on the Ronin and perhaps someone with one of the others can give their points.
Thanks again.
Forum: Pentax Full Frame 10-18-2018, 06:48 PM  
K-1 for filming. Which Gimbal?
Posted By pcrichmond
Replies: 6
Views: 716
Please post what you might come up with ( or give me a PM), as I'm in the same situation. I'd really like to hear what information you might find or experience.
Looking to learn and practice video myself but don't have any serious need to purchase a new camera for it and already have the K-1 I've been using with lighter M42 lenses.
I've been practicing on a monopod and had thought of just getting a roll head gimbal but wondering if it might be nicer to have a full 3 axis.
I was looking at the Ikan and the new Glidecam Centurion. Both are at the top end of my budget but willing to pay the price for the experience; plus it seems either would be able to be utilized if I did decide to upgrade to a video only setup.
Forum: Pentax DSLR Discussion 10-07-2018, 07:38 PM  
Considering Full-spectrum Conversion
Posted By pcrichmond
Replies: 6
Views: 750
Hi @Barry Pearson, The R72 will give very nice results. I also use the older 29F for faux color and my favorite is the #87 for more of a monochrome effect.
If you're wanting to have a great learning experience try the UV but be prepared to do your homework before shelling a lot of money out. I'm glad I did.

As @dtrego mentions there is a very nice site for UV information.
Filters are not the initial cost, more it will be a lens that has good UV transmission.
True UV lenses are very expensive but the site mentioned by dtrego has several "accidental" lenses that perform well.
None of my Pentax glass (even vintage K and M series or coated Taks) transmit good UV due to the excellent coatings.
If you are wanting to photograph hand held or on a tripod with shorter shutter speeds and low iso then the lens will be your biggest obstacle.

Older basic triplets seem to be the best and a few 4/4 configurations work too, several older enlarging lenses transmit very well if you have a helicoid to focus with.

I was lucky enough to find an old M42 mount Steinheil Cassarit 50mm in great condition that does well down to 340nm. My old Domiplan 50mm does alright at 360nm. Also I have a Zeniton 35mm I picked up on the forums that works well at 360nm but the longer focal length Zeniton I have performs poorly even though it is still a 4 element 4 group lens.
Oddly enough my old Lensbaby Soft Focus optic transmits down to 340nm (none of my other Lensbaby's have good transmission though). Depending on the lens, the cement used in combining elements into groups can deter the UV transmission quite a bit too.

Filters from uviroptics are of good quality. Note you will also need an S8612 or BG38, 39, or 40 to stack on top. UV pass filters also transmit a lot of IR and will give you more of the IR effect due to contamination if you don't use a second filter to cut out the IR. Check filter transmission charts to see which you might prefer..

One of my post using the Steinheil: Needing a challenge - UV340 - PentaxForums.com
and one using the Soft Focus optic: UV attempt with Lensbaby - PentaxForums.com
Forum: Pentax DSLR Discussion 10-05-2018, 02:16 PM  
Considering Full-spectrum Conversion
Posted By pcrichmond
Replies: 6
Views: 750
I have a FS converted K-01 done by Isaac Szabo (Isaac Szabo) and loved it so much I bought a refurbished K-1 from Kolari.
I use mine for IR & UV photography.
Not sure what Spencers is meaning by "re-enable the dust reduction system"?
The dust removal itself is done by vibration of the sensor. For a FS conversion the hot mirror is removed from on top of the sensor but nothing else in done to the sensor. Silicon layer and all mechanical for the sensor remain the same. Perhaps Spencers is reinstalling a thin piece of clear glass to help keep dust off of the sensor.
Both of my FS conversions still function as my other cameras (second K-1 and K-3) with the exception of needing manual white balance.

The folks at Kolari were very helpful every time I called with questions. I asked about getting mine with an AR (anti-reflective) coating to avoid IR hotspots.
We determined it wasn't necessary due to the vintage lenses I'm using all perform relatively well in IR.
Perhaps this AR coating would provide a bit of dust protection also, you might give them a call and ask.
They also offer an H-Alpha conversion for Astro.

I believe Isaac does a simple hot mirror removal, but the dust shake at start up works fine. I do have to do a bit more sensor cleaning with both than I normally do with the others, but keeping on top of it with a blower seems to suffice most of the time.
Forum: Troubleshooting and Beginner Help 09-16-2018, 04:28 PM  
Mineral / salt stains on lens - damanged coating or how to clean?
Posted By pcrichmond
Replies: 16
Views: 709
If I remember right Mono is high in the Calcium side (carbonates, chlorides, sulfates, etc) along with borates and other alkaloids. I'd be curious to hear from others on the forum before you try this but I wonder if using a dilution of vinegar/water on a micro fiber might remove the residual. I live down the road from Mono and have never thought about the spray when photographing there. I usually wipe immediately when done and never had residue issues yet but there will come the day (I'm sure) and knowing how another photographer has successfully dealt with this will be a big help.
Forum: Do-It-Yourself 09-12-2018, 01:11 PM  
DIY Auto Focus Rail - Part 3: C'est Fini!
Posted By pcrichmond
Replies: 6
Views: 933
Wow, that's inspiring.
Glad I've been following, you've done it.
Forum: General Photography 09-09-2018, 07:17 PM  
Oak Creek Canyon Milky Way - Lessons Learned
Posted By pcrichmond
Replies: 11
Views: 782
Wonderful images and thanks for the shoot description.
Haven't tried the astro tracer on the K1 yet, guess I'll be prepared for a little extra time if needing recalibration,
though you're probably right about the Sedona vortex :)

It's a pleasure to live in/near Dark Sky communities. I have one close too (within an hour drive). Tonopah/Goldfield region.
Makes getting out for night photography a pleasing experience.
Forum: General Photography 09-08-2018, 08:41 PM  
ADHD and Photography - Share your experiences
Posted By pcrichmond
Replies: 11
Views: 731
I'm similar to @DrawsACircle's daughter, ADD & Introversion combination.

Overstimulation can be a major drawback. Five minutes into a phone conversation and I'm gone, a room full of people at a gallery showing and we're down to about 45 seconds.
I've stuck with photography over the years because I am still able to find enjoyment in the learning and creativity, it has become a meditative and relaxing process for me.

I use a technique as @Sandy mentions, grab a single lens and go for it. I'll make projects for myself - how many different perspectives can I get of a clock with a 50mm or a leaf with a WA and flashlight for lighting effects, challenge myself with what I have with me and not worry about what isn't there.

When culling, I had a workshop instructor advise to pick 10-15 images at a time and only keep what immediately caught the eye. Do the same in round two and possibly round three until you get down to about 3-12 images (depending on how many photos to cull.) Once you've hit delete don't think about it again, there's a reason your mind was letting those go, your intuition will choose the ones you want to work with as finals.

For Post, I try to make it as relaxing as I remember the darkroom being, no open email programs, no open internet, no music, nothing. I find a quiet place to sit and focus on what I'm seeing in the photo and then start post to try and enhance my vision.

This is an interesting thread and thanks for sharing. Great responses too. I had read somewhere that the creative side of photography lends itself to introversion but the business side usually leans toward extroversion.
No matter what our personal character might be, as photographers we've probably experienced most of the items in your list.
Forum: Pentax K-1 09-05-2018, 08:00 AM  
K-1 with PENTAX-110 1:2.8 70MM
Posted By pcrichmond
Replies: 40
Views: 2,367
You folks have definitely sparked my experimentation curiosity.
I still have a helicoid and the results you're posting are amazing.
Might have to look for a few 110 lenses to play with.
Forum: Sold Items 09-01-2018, 04:13 PM  
For Sale - Sold: Raynox DCR-150 Macro Conversion Lens
Posted By pcrichmond
Replies: 14
Views: 740
Better price than you'd get at a retailer :)
Forum: Pentax K-1 09-01-2018, 04:11 PM  
K-1 with PENTAX-110 1:2.8 70MM
Posted By pcrichmond
Replies: 40
Views: 2,367
These are great and what a cleaver idea to give it a try. I'll second @Uncle Vanya's suggestion, I'd love to see what you might come up with in a reversed setup.
Forum: Sold Items 08-29-2018, 10:48 AM  
For Sale - Sold: Raynox DCR-150 Macro Conversion Lens
Posted By pcrichmond
Replies: 14
Views: 740
I've used both the 150 and 250 on my M100/4 Macro with good results though I've found I prefer the magnification of the 250 on that lens.

This Raynox 150 pairs very well with the M200/4. I've used it reversed and with 52-43 adapter for straight mount.
If I remember right Raynox says the 150 diopter is about equivalent to a 208mm focal length.
I like this setup because on a longer telephoto it leaves plenty of room for lighting between lens and subject.

If anyone is looking for an affordable way to get those closeups with a longer lens, here's your chance.
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