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Forum: Photographic Industry and Professionals 11-15-2021, 02:13 PM  
Chromatic Aberration Corrective Coating
Posted By Dipsoid
Replies: 7
Views: 403
From my understanding, refraction is the result of light taking a longer path through a medium which causes it to arrive at a different time. The index of refraction is a measurement of how fast light travels through a medium. Chromatic aberrations are caused by the refractive index being different for different wavelengths of light, thus the different colors are spread out over the image. I could be wrong though and would be happy to be corrected.
Forum: Visitors' Center 10-24-2021, 06:08 AM  
pentax super program slr camera film advance stuck
Posted By Dipsoid
Replies: 2
Views: 439
Have you checked your batteries? I believe the Super Program can't advance the lever without working batteries
Forum: Pentax SLR Lens Discussion 06-24-2021, 06:52 PM  
300mm lenses
Posted By Dipsoid
Replies: 14
Views: 756
The one that I'm looking at is just the Super Takumar, so I guess it's one of the final two versions. I assume it's not multicoated then? The prices are all over the place on the reviews so it seems like a good deal, though it might be a gamble because the pictures aren't super clear.

---------- Post added 06-24-21 at 06:54 PM ----------


I don't know, this Vivitar (Tokina) zoom is really damn good, and maintains its quality at the long end. I'd say it performs better than my SMC-M 200mm at 200. It's only weakness is moderate to heavy CA even stopped down.
Forum: Pentax SLR Lens Discussion 06-24-2021, 06:10 PM  
300mm lenses
Posted By Dipsoid
Replies: 14
Views: 756
I'm looking for a decent manual focus 300mm prime for shooting film. I currently use a Vivitar 100-300mm f/5 zoom which is actually really good for a vintage zoom, but it's really heavy. I'm looking for something a little better and maybe more compact. My budget is 100-150 USD or less There doesn't seem to be a lot of options out there. Most vintage primes in that range don't seem to be well reviewed, but if be curious of any opinions out there. I came across a Super Takumar 300mm f/4 for 80$ which seems like a good deal, but am I better going with something else?
Forum: Pentax News and Rumors 01-15-2021, 10:03 PM  
Guangzhou | K-3 Mark III preview meeting
Posted By Dipsoid
Replies: 264
Views: 30,936
Northrup is the Ken Rockwell of YouTube. It honestly boggles my mind that anyone takes him seriously.
Forum: Pentax SLR Lens Discussion 12-12-2020, 10:12 PM  
Cleaning Takumar Super Multi Coated 300mm F4
Posted By Dipsoid
Replies: 6
Views: 686
Dust in the lens won't show up as spots, that sounds like dust on your sensor. Even things like fungus won't show up as direct artifacts in photos, but will cause things like loss of contrast. I wouldn't spend the time to take apart the lens just for something so minor. If you're really worried about it I would get it CLAd by a professional.
Forum: Non-Pentax: Canon, Nikon, Sony, etc. 11-01-2020, 06:44 AM  
Any Konica FS-1 owners?
Posted By Dipsoid
Replies: 14
Views: 927
I've always eyed the Konica Autoreflex, but between my Pentax K, Minolta SR, and Topcon RE systems I have too many cameras. I do wish they had settled on apperture rather than shutter for their priority mode, I never use shutter priority. Otherwise just the Autoreflex with the 40mm 1.8 wouldn't be a bad setup.
Forum: Pentax Price Watch 10-24-2020, 08:47 AM  
FA*600 on ebay
Posted By Dipsoid
Replies: 7
Views: 966
It's a common practice. An eBay seller gets their account compromised via phishing and a scammer uses the legitimate account to scam people with photos and descriptions of high value items stolen from other listings.
Forum: Pentax Film SLR Discussion 09-30-2020, 04:11 PM  
Help a brother out? Need camera advice...
Posted By Dipsoid
Replies: 32
Views: 2,565
If you want something loaded with features and don't care if it's a bit plasticy, go with the Super Program. Think of it as the equivalent to Canon's AE1 Program or Minolta's X700. The ME Super has a better feeling build quality, but I've found they generally have more problems. I wouldn't go with any AF bodies if you're going to shoot with MF lenses, the experience of focusing is more difficult with the plain focusing screen. If you don't need manual exposure, you could go with the ME or ME SE. I prefer the SE because the smooth leatherette is nicer feeling than the typical leatherette. Good luck!
Forum: Pentax News and Rumors 06-29-2020, 05:02 AM  
Pentax Aperture Block, Black Picture Problem Class Action Lawsuit
Posted By Dipsoid
Replies: 407
Views: 37,949
Except it's really not. You're not served a battery-powered blender with exposed blades and no safety features in a drive through that could easily drop in your lap. The temperature McDonald's served their coffee at was incredibly unsafe and the injuries the poor woman recieved were horrible.
Forum: Pentax Film SLR Discussion 06-08-2020, 06:42 PM  
Normal for film advance on an LX?
Posted By Dipsoid
Replies: 8
Views: 782
What do you mean by "notchiness"? My LX advances consistently and smoothly. Yours could possibly need a lubrication, so it might be worth a CLA.
Forum: Digital Processing, Software, and Printing 05-30-2020, 09:03 PM  
Pointer device?
Posted By Dipsoid
Replies: 11
Views: 802
I use an ergonomic vertical mouse. It takes a bit to get used to, but you'll never want to go back to a standard mouse once you do. It's way better on the wrist than a regular mouse. It forces you to use a handshake posture while holding the mouse which takes pressure off of the carpal tunnel nerve. I also use a very old Wacom Intuous 3 tablet for editing which is also way more ergonomic than a standard mouse, and gives you much more control.
Forum: Digital Processing, Software, and Printing 05-30-2020, 08:02 PM  
Digitize Negatives with Negative Lab Pro (Lightroom Plugin)
Posted By Dipsoid
Replies: 2
Views: 1,081
Is that the digitaliza film holder? I have both the 120 and 135 holders, while it's awesome that you get the full film border with the 135 one, it is terrible for film flatness. I often have to open it and relay the film multiple times to even get semi flat negatives. The 120 one is okay though. Negative Lab Pro is amazing, and we'll worth the hundred bucks if you shoot film. On the light table, just make sure you get one with a decent CRI. I bought a tracing pad that has a really high luminance value and a rechargable battery, but gives sometimes poor results and I get terrible color shifts towards the edges of the light pad. The brand I have doesn't publish the CRI for the model I bought which likely means it's very low.
Forum: Lens Sample Photo Archive 05-07-2020, 05:56 AM  
Auto - Topcor 58mm f1.4 (M42)
Posted By Dipsoid
Replies: 36
Views: 2,842
Lucky you, these lenses are really expensive and rare. I have the RE original version of this lens and it's my favorite standard lens ever and I wish I could shoot it on my Pentax, although I don't believe the Cosina reproduction will be quite the same. Cosina tweaked the optical formula and the single coated nature is what gives the original so much of its character. It's beautifully sharp wide open but the washed out contrast gives the images it makes a really unique vintage look.
Forum: Sold Items 03-10-2020, 01:18 PM  
For Sale - Sold: Pentax LX body
Posted By Dipsoid
Replies: 6
Views: 1,096
Oof, this is a very tempting price. I paid about the same for one in user condition with a 28 and the hand grip, but the prism is scratched to hell, and I've always been curious about picking up one in better condition.
Forum: Non-Pentax: Canon, Nikon, Sony, etc. 03-07-2020, 07:12 AM  
Found a MINT Nikon FM2n.....Wow !
Posted By Dipsoid
Replies: 26
Views: 1,764
Lucky you! I think the prices are so crazy because that's the only camera with a mechanical shutter speed that fast. It has some sort of crazy carbon fiber shutter curtain.
Forum: Pentax News and Rumors 01-26-2020, 02:58 PM  
HD Pentax-D FA 70-210mm f/4 ED SDM WR
Posted By Dipsoid
Replies: 1,461
Views: 135,399
Aren't Limited size is kind of an understatement, the 45 is close to the size of the 50mm ART and has a slower aperture.
Forum: Pentax Film SLR Discussion 01-02-2020, 07:54 PM  
Gear P0rn - post it if you got it.
Posted By Dipsoid
Replies: 8,146
Views: 1,067,857
I had a Petri Racer, which was an awesome camera until the rewind crank broke. It's a more compact rangefinder with the same 45mm lens on it. It's sad that they remained in the shadows of the Electros and Canonets.
Forum: Pentax News and Rumors 12-22-2019, 08:16 PM  
New information about new flagship's selling date
Posted By Dipsoid
Replies: 1,650
Views: 135,076
There was definitely some confusion on the launch of the KP. I could be wrong, but I distinctly remember the marketing material in the very beginning placing the KP as a replacement for the K-3ii, but then Ricoh backpedalled very quickly and said that it was a new product line.
Forum: Pentax News and Rumors 12-14-2019, 08:00 AM  
interview with Ricoh Imaging General Sales Manager for Europe
Posted By Dipsoid
Replies: 712
Views: 43,536
Sony has a 20mm APSC lens that is as pancake as pancake could be. For full frame, the Samyang primes are pretty compact. The Loxia 21 it's pretty compact and faster than the Pentax, I'd be curious to see its size comparison with the Pentax+adapter. There is a disappointing amount of small lenses for Sony. The Fuji stuff is pretty small, but only APSC.
Forum: Film Processing, Scanning, and Darkroom 12-02-2019, 07:49 PM  
Where to scan medium format negatives?
Posted By Dipsoid
Replies: 9
Views: 1,069
There is someone who uses a K-1 with pixel shift on the "digitizing film with a digital camera" Facebook group and theit results have looked great, although I don't know if they've done any comparisons. From what I've gathered, digitalizing with a camera gives much better results for 35mm, but I'm not sure about larger sizes. I use a K-3 but definitely want to pick up a K-1 or K-P at some point for the pixel shift to see for myself.
Forum: Pentax Price Watch 12-01-2019, 08:17 PM  
Takumar 50mm f/1.4 at a good price
Posted By Dipsoid
Replies: 12
Views: 757
Definitely not long gone, maybe more rare though. There are deals to be made on eBay if you look closely at listings. I just recently got a PZ-1P in perfect order with a SMC K 20mm f/4.0 attached for an absurdly low price because the listing was completely mislabeled. The 20 is at the local camera repairman getting a CLA and I could probably sell the PZ-1P for most of what I paid on eBay for the whole thing. I also got an M 40mm pancake for like 30$. I was watching when it was more than 60 I think, the listing said it had some haze. The seller first lowered the price, then within a few days sent me an offer for 30$ and I accepted without blinking. The lens looks pretty clear of haze to me and is cosmetically near mint.
Forum: Film Processing, Scanning, and Darkroom 12-01-2019, 12:24 PM  
Where to scan medium format negatives?
Posted By Dipsoid
Replies: 9
Views: 1,069
Get an Epson V600 and do it at home, that's your best bet. Otherwise use your DSLR, and a macro lens and light pad or iPad with an old enlarger/tripod/copy stand. That's what I do and it yields great results, much better than my local lab. Plus I get to control the inversion of negatives. Negative Lab Pro is an amazing plugin for light room and I believe they're running a 10 dollar off deal right now.
Forum: Sold Items 11-30-2019, 01:36 PM  
For Sale - Sold: Pentax MX with case and lens
Posted By Dipsoid
Replies: 2
Views: 1,489
PM sent
Forum: Pentax SLR Lens Discussion 11-17-2019, 05:36 PM  
Permanent M42 Adapter to Lens?
Posted By Dipsoid
Replies: 50
Views: 3,119
The removal is not a pain IF you use the genuine Pentax adapter. You use your fingernail and it's really simple. M42 lenses often work fine in av mode if they have a manual switch for the aperture. The viewfinder just gets darker as you close down the aperture.
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