Forgot Password
Pentax Camera Forums Home
 
Log in or register to remove ads.

Showing results 1 to 25 of 160 Search:
Forum: Pentax Medium Format 03-14-2018, 06:49 PM  
Filling a gap in a lens lineup for an Alaska trip
Posted By Lacunapratum
Replies: 36
Views: 3,174
You guys got it all wrong. The 600mm A is for the pictures. The 800mm/4 with the big Pentax 6x7 is to knock them bears over the head. Either end works by the way.
Forum: Pentax Medium Format 03-12-2018, 10:20 AM  
Filling a gap in a lens lineup for an Alaska trip
Posted By Lacunapratum
Replies: 36
Views: 3,174
I use the following lenses for such a trip: FA ED 400mm/5.6, FA 200mm/4, A Macro 120mm/4, an adapted Imagon 120mm H=4.5, D FA 55mm/2.8, HD 35mm/3.5, DA 25mm/4, and the 1.4x teleconverter. The 400mm/5.6 is a great and compact medium photo telephoto, which still works with the 1.4x teleconverter the 200mm is a much underappreciated lens that doubles up for portraits and environmental details, the A version of the 120 is much more compact than the FA, and for macro I don't need autofocus anyway, the Imagon can work as a wonderful portrait lens, the 55 and the 35 are excellent allrounders in their respective focal lengths, and the 25mm is a jewel IMHO. I must confess that during film years and when I was younger, I carried a 600mm/5.6 A through Katmai and along the shores of the Shelikof Strait, and that was just wonderful for bears and wildlife. It's weight though limits the number of other lenses on such a trip.
Forum: Pentax Medium Format 10-31-2017, 06:21 AM  
no new Pentax645 news
Posted By Lacunapratum
Replies: 7
Views: 1,187
I had been optimistic before, but this time the price drops in combination with patents for a new telephoto zoom are promising though.

I don't need their zooms. I want primes. For many reasons (size, weight, design) medium format is for primes. Unfortunately, Fuji has done it all right. Those lenses. Enviable. And in an amazing short time.

But perhaps Pentax catches on. Eventually.
Forum: Pentax Medium Format 05-29-2017, 06:35 PM  
Africa trip with 645
Posted By Lacunapratum
Replies: 9
Views: 1,506
Your key lens would be the 600mm A, and you'd need a rail to get perfectly sharp images. That rail takes some space and also comes in at some weight. In addition I'd take a 200mm FA for portraits, and a 75mm and a 35mm A as lightweight standard and wide angle lenses, and a set of extension tubes for macro. All fits into one of those Thinktank backpacks (Streetwalker?). This way you can use the 645Z (fairly robust), get great images, and don't need to have a second system. If you have doubts about your 645Z and you are willing to carry a little bit more, you can use a K1 as a second body and a 15-30mm lens and an adapter for the 645 system.
Forum: Pentax Medium Format 02-28-2017, 12:59 AM  
300mm f/4 lenses....how do they stack up 'real world'
Posted By Lacunapratum
Replies: 9
Views: 2,449
Great post. I find those real-life tests so much more telling.

I am especially impressed with your Kilfitt. I have two of them, but I only systematically tested one of them, and it did not stack up against the Pentacon. I guess I should give it another chance.

All of these tests, especially those of medium format telephoto lenses, are so sensitive to focusing error. It seems to me that the picture that you showed as the one taken with the 300mm/4 P67 ED lens appears to be front focused. You will notice that especially if you compare the marble wall under the flower vase. That would explain the surprisingly low performance of the P67. Too me the flowers appear out of focus and not less sharp as a result of a weaker lens. I have been wrong before though. Narrow focus bracketing would tell.

My P645 300mm/4 IF ED and the P67 counterpart are exceptional lenses and I'd be hard pressed to tell any difference. They both win by closing the diaphragm to F5.6.

Just my perception. Great test nevertheless.
Forum: Pentax Medium Format 02-27-2017, 08:47 PM  
Horizon line detail: 645Z & 28-45, 120 macro, 45-85
Posted By Lacunapratum
Replies: 14
Views: 1,540
I would also guess atmospheric conditions over a (relatively) long exposure period are the culprit. Against all common sense, you could increase the ISO settings and open up the diaphragm little. ISO 3200 still works wonders on the 645Z and you could open up the aperture to 8 or even 5.6, and your image would still be way sharper than the one you got in your post.
Forum: Pentax Medium Format 01-21-2017, 03:43 PM  
Fuji Medium format price announced in USA $6,499
Posted By Lacunapratum
Replies: 47
Views: 4,850
I wouldn't be surprised if Pentax would announce the 100 MP 645 camera at CP+. They love CP+ for their big announcements and Ricoh has managed to be quite tight-lipped about new product announcements if they chose to be. Such an announcement would also take some wind out of Fuji and Hasselblad because the 100 MP sensor would make up for some of the limitations of the current lens lineup. But I have been wrong before...
Forum: Pentax Medium Format 12-11-2016, 10:59 PM  
Pentax 645 to Fuji / Hasselblad? Anyone considering the switch?
Posted By Lacunapratum
Replies: 38
Views: 4,448
I got two of those 25mm just in case one of them breaks :). I guess Pentax is busy right now developing their full-frame system, which appears to be selling better than expected. Happy for Pentax. I'd be glad to see a new body with the 100MP sensor and some new primes that will come with it, including an extreme wideangle. A fast portrait prime along the way wouldn't hurt either, and a longer macro.

In the meantime the prices for the body will go down. Based on everything else Fuji has done with their lenses, those new 23mm and 110mm are likely to rock. I also love the design of the camera, but I guess that's a matter of taste.

And then their flyer recalling half a century of Fuji lens design, for the 6x8, the GSW, and the large format lenses. They definitely know how to market themselves.
Forum: Pentax Medium Format 12-11-2016, 10:50 PM  
Bag recommendations for 645z and 3-4 lenses?
Posted By Lacunapratum
Replies: 13
Views: 2,518
I recommend the larger ThinkTank Retrospective models (40 or 50). They hold a 645D with a 150mm attached, a 300mm/4, the 55mm A, and a 25mm or 35mm wide angle. Ideal walk-around kit.
Forum: Pentax Medium Format 12-07-2016, 12:48 PM  
Pentax 645 to Fuji / Hasselblad? Anyone considering the switch?
Posted By Lacunapratum
Replies: 38
Views: 4,448
I find the Fuji and its conceived lens portfolio incredibly attractive and I was blown away by it initially. Especially the 23 and the 110mm/2 lenses, just what makes me salivate. I had all those odd Fuji cameras during film days, the GSW690, the big 680, and some large format lenses, and I loved those cameras and lenses. Then there is lots of talks about adapters and there seems to be a good chance for adapters for the Mamiya 7 lenses and the Rolleiflex lenses. Thus, it would only make sense for me to get one.

After my initial excitement wore off and I had more time with my 645Z and 645D I once more appreciated what fantastic cameras they are. The native lenses are great, and I am a big fan of the 400, the 300, the 150, the 25, and some of the 67 lenses, but in addition to those I have a plethora of adapted lenses, macro and portrait, and it would make little sense for me to change those setups. Thus, the 645z and 645D are certainly plenty of camera and I occasionally wonder (between episodes of GAS) how much camera one really needs. The Pentax 645 system is just so photographer friendly, almost more so than the CANIKON consumer models, but with an eye for the professional.

I guess I'll get one of those GFXes eventually, but perhaps not with the same sense of rush and excitement that I had at photokina. Also, a new 645 body with even higher MP would be great, and perhaps we'll see some more 645Z price reduction.
Forum: Pentax Medium Format 09-30-2016, 09:05 PM  
Help Deciding on Which lens for my 645Z
Posted By Lacunapratum
Replies: 14
Views: 1,506
These are my two shoulder bag kits: (i) FA 300mm, FA 150mm, A 55mm, and DA 25mm (645D) or (ii) FA 150-300mm, P67 55-100mm, and DA 28-45mm (645Z). Both give great results. You could use the first kit with the 75mm instead of the 55mm.
Forum: Pentax Medium Format 09-21-2016, 11:35 PM  
Fuji mirrorless medium format.
Posted By Lacunapratum
Replies: 152
Views: 15,605
I would have wished that camera would have had the Pentax name tag on top of it. But for whatever reason, Pentax hasn't gone that route.

Everything that's so intriguing about the Fuji seems to have disappeared from the Pentax portfolio as of today with the exception of 645D and 645Z cameras. The Fuji lens line-up is just a dream. According to rumors, Fuji has been working on the system for quite some time, and it shows. Those lenses, 23, 110/2, and a new 120 prime, and even the 63mm and a new 45mm show how much the minds of photographers were driving the GFX concept. The quirky camera shape. How Fuji. And then those flyers and web sites reminding future customers of Fuji's glorious past in medium format: the GSW690 and the GX680 with all its lenses. Fuji even had fantastic large format lenses. I guess what impresses me most is how well the GFX is developed.

I am grateful to Pentax for coming out with the 645D and the 645Z. Great bodies. I had all those old 645 and 67 lenses, and I was one of those who had been waiting for a decade without selling any of them. Pentax delivered, and now all those wonderful lenses continue to be used. They are at the verge of being old. Not too old, but somewhat. Pentax' new lenses have been seriously underwhelming for me, and I don't see much change. The only lens I found exciting was the 25mm, and that had a number of quality issues and is no longer manufactured. I am annoyed by the barrel distortion of the 28-45mm at the wide end, and I find 90mm as a medium format focal length utterly unusable. I am sure others will disagree. I find the new 35mm and the 55mm o.k.. I have them all. I am dreading the next two announcements with those zooms. Medium format for me is not about zooms. Zooms are for 35mm. In medium format, zooms are clumsy and slow. At least they don't fit my style. Ricoh has saved Pentax, but I am afraid they turn even the cameras and lenses into copy machines.

Others, I know, will disagree, but for me, Fuji just came out with a lens portfolio that 100% matches my shooting style. And I find the camera looks way cool. The only concern I have (nobody mentioned that so far) is that huge sensor exposed to the elements. There'll be a lot of sensor cleaning going on. But that's the only relative advantage of SLRs: the mirror protects the sensor from dust. Otherwise the Fuji is just what a medium format camera should be today, IMHO.

I have recovered from the immediate "I want it" reaction and I am not sure whether I'll fall for it. If they make an adapter for those Mamiya 7 lenses I'll bite. Otherwise, as others mentioned, the 645Z is a fantastic camera that can do a lot of things. It's hard to switch systems, especially if one has as many lenses as I have. 35mm digital has come awfully close toward realizing a level of sophistication that became the reason for me switching to medium format in the early 1980ies. The Sony A7RII and the Nikon D810, and probably others. Thus, I am not sure whether the GFX will ever become my camera. Well, yes, the 110mm, but I have a 110mm/F2 Planar for my Rolleiflex and chances are that while the Fuji will be sharper, the dreaminess of the the F2 Planar will not be matched.

After a few days I also realized that it really doesn't matter for me whether it has the Pentax name all over it. All the Pentax lenses are SLR designs. Even if this was a Pentax, chances are that Pentax would have had to develop an entirely new system, perhaps with a couple of adapters to fit the old lenses on the new camera. And then they would be awkward to use.

Hands down though, the GFX is a marvelous camera and a marvelous concept. It brings the love for detail and the passion for photography of an almost bygone era back into the digital world. Even though it's just a tool, the GFX is one I respect and admire.
Forum: Pentax Medium Format 09-20-2016, 12:22 AM  
Fuji mirrorless medium format.
Posted By Lacunapratum
Replies: 152
Views: 15,605
What a beautifully conceived camera. As someone said somewhere else: a photographer's camera. Or as Gavin Cato said, a Pentax 23mm and a 110mm would get me excited again. But then the Fuji body ... so well designed . .. major drool factor.
Forum: Pentax Medium Format 09-19-2016, 06:55 PM  
Fuji mirrorless medium format.
Posted By Lacunapratum
Replies: 152
Views: 15,605
... for example, almost don't dare to mention, those Mamiya 7 lenses? Any possibility to make an adapter that would connect the electronics? I know they aren't really designed for digital because of their short focusing travel, but I for sure would love to continue using them.
Forum: Pentax Medium Format 09-19-2016, 05:57 PM  
Fuji mirrorless medium format.
Posted By Lacunapratum
Replies: 152
Views: 15,605
The camera and lenses Pentax should have made while diddling with everything else.
Forum: Pentax Medium Format 09-12-2016, 12:42 AM  
Which shoulder bag for Pentax 67II + 3 lenses?
Posted By Lacunapratum
Replies: 11
Views: 2,130
ThinkTank Retrospective 50 if you still can find one.
Forum: Pentax Medium Format 09-04-2016, 10:17 AM  
A200 macro f4.
Posted By Lacunapratum
Replies: 14
Views: 1,451
Sublime.
Forum: Pentax Medium Format 09-03-2016, 09:21 AM  
A200 macro f4.
Posted By Lacunapratum
Replies: 14
Views: 1,451
Thanks for your nice note, Marcus. You'll be quite close with the MP-E. I'd keep the 200mm Pentax in case you decide to get a K-1 one of these days :).
Forum: Pentax Medium Format 08-28-2016, 07:36 PM  
645 and Photokina
Posted By Lacunapratum
Replies: 9
Views: 2,016
I wouldn't mind seeing their collaboration with Tamron continue, when it comes to K-1 lenses, perhaps with improved quality control. Tamron's putative 115mm/1.4 (announced for Sony A) seems interesting, and they appear to have a number of excellent 1.8 VR lenses in the pipeline. Perhaps a new 50mm/1.2, a new 300mm, and a new 24mm (all Pentax designs), and Pentax would be back in business, at least for the time being.

A Tamron alliance would allow them to move forward with the 100MP 645 body. Pentax apparently bought an option on those sensors. This would allow them to keep the momentum. They'd need a few more lenses though for the new sensor.
Forum: Pentax Medium Format 08-27-2016, 01:02 PM  
A200 macro f4.
Posted By Lacunapratum
Replies: 14
Views: 1,451
Your 200mm macro covers at macro distances. It's an excellent lens. The issue is just to get a suitable adapter to preserve your automatic functions or at least facilitate a stable mount. You would do better getting a K-1 to use this lens.

The 120mm A and FA are ideal macro lenses for the 645 in many ways. The shorter 90mm is sharper, but 90mm is too short of a focal length for many macro applications. Longer focal lengths pose challenges any which way.

One workable compromise for the 645Z is the 150mm Apo Componon HM with adapters and extension tubes. You'll loose automatic aperture control and you need rather long extension tubes, but it works and the lens is outstanding at macro distances. It covers well and you will still have a good working distance. Alternatively, you could use a 150mm/2.8 Printing Nikkor or the 165mm/4 Ultra Micro Nikkor. Both are extremely sharp lenses, but they close down only to F11, and that is not enough for many applications. Sharpness is exceptional though. If you want to go to even longer focal lengths, why not try one of those 240mm/9 Apo Nikkors? Those close down and are relatively compact to use. However, at 240mm, you'd need huge extension contraptions to reach sufficient magnification. Working distance would be excellent though.

If you were to consider other systems, the Sigma 180mm/2.8 is an excellent macro lens. It suffers somewhat from focus breathing, but the image quality certainly makes up for it. Not sure whether it's available in Pentax mount, but I am using it with great success on my Nikon. Another long distance macro rig that works very well is the the 200mm Micro Nikkor on one of those new Sony cameras. The 7Rii has a fantastic sensor and image stabilization, and the Nikkor can be readily adapted and used in manual focus mode. The Micro-Nikkor is very sharp on the A7Rii and does not suffer from focus breathing at all, as far as I can tell.

By far the best systems for medium format macro photography were those Rolleiflex medium format SLR systems. The SL66 with built-in bellows and the 6000/Hy6 series with three lenses exclusively designed for macro photography. In addition, the Hy6's Curtagon was perfect for automatic diaphragm macro photography at high magnification in reverse position. There was a 150mm/4.6 Apo-Symmar for the automated bellows and you could add multiple extension rings, and the whole thing used leaf shutter lenses so that you'd get minimum vibrations. With some of those newer systems it is impossible to add more than one extension tubes. The Rolleiflex apparently has no limits. The tubes would slightly vignette in the corners, but that is easy to cut off.

For you at this point, the easiest solution would be to get a K-1. You won't be disappointed.
Forum: Pentax Medium Format 08-23-2016, 02:01 PM  
smc PENTAX-6x7 1:5.6 500mm
Posted By Lacunapratum
Replies: 3
Views: 1,415
... and because of the 400mm and 800mm ED lenses.
Forum: Pentax Medium Format 02-18-2016, 09:31 PM  
Contax 645 80/2 on 645z
Posted By Lacunapratum
Replies: 30
Views: 9,999
Nice.

For the Rolleiflex you could also get a Xenotar 80mm/2.

I have never been drawn to fast standard lenses, but both would be a reason for an exception.
Forum: Pentax Medium Format 02-18-2016, 09:28 PM  
The case for a fast super wide
Posted By Lacunapratum
Replies: 35
Views: 3,591
I bite for the 20mm part of it. 22mm. Still a feat for medium format. I can't imagine f/2.8. F/4 would still be huge and super expensive.
Forum: Pentax Medium Format 02-18-2016, 07:55 AM  
Is there any faster than f=2.4 lens for 67 system?
Posted By Lacunapratum
Replies: 16
Views: 4,663
If speed is what you want, Astro Berlin lenses show up from time to time on ebay. There is one with a P67 mount right now I believe. They come in various flavors either as 150mm f1.8 or f2 and their names are Pan-Tachar, Tachonar and others. They are not your sterile modern digital medium format lenses, but they certainly have narrow depth of field, speed, and bokeh. Just beautiful drawing from a bygone era.

Another fast lens with narrow depth of field is the 180mm f/2.8 which has been manufactured by Carl Zeiss Jena or Pentacon. They have been occasionally adapted for P67 with good success. Those are sharper than the Astro Berlin lenses and go back to the old Olympia Sonnar. Coatings are not up to modern standards, but once more, it's a fast lens with narrow depth of field. Both are quite nice for portraits. You were asking about a Zeiss, and that would be the one.

If you are willing to give up on the diaphragm and just want to shoot at or around f2 you can also adapt some of those cinema projection lenses. The shorter focal lengths don't cover, but those around 120mm or longer do. They are fairly sharp and some are well coated.

Finally, those Zoomar lenses came at varying levels of performance, but some were remarkably good.
Forum: Pentax Medium Format 01-16-2016, 03:23 PM  
Next version of Pentax 645
Posted By Lacunapratum
Replies: 51
Views: 6,295
I'd guess they'll show the new one at CP+. I am sure Sony came up with some sort of a deal to split sensor development costs between Phase, Hasselblad and Pentax. Pentax loves CP+ and the 645 system has many fans in Japan. The 35mm HD revision makes me believe its one more SLR incarnation (as I mentioned in an earlier post). Apparently Fuji is working on a medium format mirrorless. Don't know which sensor they'll be using though. But for Sony it will make sense to be able to divide sensor costs between three different brands.

For me the 645Z is as much camera as I will ever need. I would rather prefer they would try to implement shake reduction or spend more effort on upgrading their lens line-up. 100mp will certainly be great for some images, will have amazing tonal range, and narrow depth-of-field, especially if its full-frame. But think about those files. 100mp. How often will your images require that level of resolution?

Nevertheless, sensor size will sell and Pentax will want to stay in the game at least with their 645 system. 645Z prices may further go down as a result, and there might be a great chance to pick up another body or to upgrade from the 645D.

It's a great time for medium format.
Search took 0.01 seconds | Showing results 1 to 25 of 160

 
Forum Jump


All times are GMT -7. The time now is 03:58 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top