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Forum: Pentax Medium Format 08-19-2014, 05:33 PM  
Pentax 645z vs Phase One IQ250 vs Hasselblad H5D-50c
Posted By Hakusan
Replies: 15
Views: 10,080
Hasselblad and Mamiya cameras are taken out into the field often. There are many landscape photographers that use them. Even Phase backs on Alpa, Arca Swiss, Cambo, and Linhof technical cameras are used in the field. This is nothing special to Pentax.
Forum: Pentax Medium Format 08-04-2014, 08:52 PM  
Pentax HD PENTAX-DA645 28-45mm f/4.5 ED AW SR Lens listed on B&H
Posted By Hakusan
Replies: 20
Views: 3,448
Forum: Pentax Medium Format 07-19-2014, 08:17 AM  
Post your medium format photos!
Posted By Hakusan
Replies: 15,869
Views: 2,624,980
645D

Forum: Pentax Medium Format 07-19-2014, 08:16 AM  
100mm Macro A compared to new 90mm Macro
Posted By Hakusan
Replies: 15
Views: 3,081
With the A 120mm on a 645D:



And handheld:



If you are using this on a tripod with slower shutter speeds, it needs to be solid. I would look at your tripod first. If your lens is sharp at longer distances, it should be sharp a closer ones.
Forum: Pentax Medium Format 07-16-2014, 06:13 PM  
Pentax 645Z Hands-On Field Test - The Camera Store
Posted By Hakusan
Replies: 7
Views: 1,645
??? You can do handheld macro shots with the 645D and a whole bunch of other cameras as well.

---------- Post added 07-16-14 at 09:17 PM ----------



It does not really matter. Signal would be higher and that would be enough of a reason to go to a lower ISO even if DR does not increase. But considering other Sony sensors, the "base" ISO would be around 100 ISO, where 50 ISO would give the same DR, but with better signal.
Forum: Pentax Medium Format 07-15-2014, 05:34 PM  
Do you have examples of 645D with 67 lenses
Posted By Hakusan
Replies: 13
Views: 3,193
Compared to the 55mm, you have a difference in angle of view of 1.91X to 2.18X for the 105mm to 120mm. In practice, you simply don't notice the 14% difference in focal length. But given your criteria, the 75mm 645 A and FA lenses will be closer to 55mm. Or the 90mm 67 lens.
Forum: Pentax Medium Format 07-14-2014, 07:34 PM  
Do you have examples of 645D with 67 lenses
Posted By Hakusan
Replies: 13
Views: 3,193
I sold my Takumar 105mm f/2.4 and got the 645 A 120mm Macro. A far better lens on the 645D. It is sharper and has better color. The 105mm 67 lens is not bad, but there are better choices for that focal length.
Forum: Pentax Medium Format 07-07-2014, 08:30 PM  
Pentax 645Z - A few thoughts and pics
Posted By Hakusan
Replies: 10
Views: 7,212
Chris, take care in the approaching typhoon. Although, it might be a good test to see how weatherproof the camera is...
Forum: Pentax Medium Format 07-01-2014, 03:20 PM  
Favorite Pentax marketing stunt with 645z
Posted By Hakusan
Replies: 10
Views: 1,352
Well, now I know how to clean my lenses...
Forum: Pentax Medium Format 06-29-2014, 12:20 PM  
Medium Format Questions
Posted By Hakusan
Replies: 7
Views: 1,210
Focal length is focal length and simply an optical distance.

Focal length plus sensor dimension determines angle of view.

Magnification is determined by focal length, not sensor size.

Sensor size regardless of pixel resolution determines depth of field.

The larger the format, the more efficient it becomes. While you can have differing format have the same pixel resolution, or increasing frequency, it is harder to achieve the same amplitude (sometimes referred to as micro contrast) with an increasing frequency. So yes, the real estate makes an impact on the image. However, there are other factors that change those things and there are more than pixel resolution and sensor size that contribute to pleasing images.
Forum: Pentax Medium Format 06-27-2014, 03:03 PM  
Post your medium format photos!
Posted By Hakusan
Replies: 15,869
Views: 2,624,980
Thank you.
Forum: Pentax Medium Format 06-24-2014, 06:49 PM  
Post your medium format photos!
Posted By Hakusan
Replies: 15,869
Views: 2,624,980


645D, 55mm DFA
Forum: Pentax Medium Format 06-24-2014, 05:23 PM  
645z ISO shots by MT
Posted By Hakusan
Replies: 13
Views: 1,223
Well, perhaps he is human and was really surprised his image was stolen by a company that should have known better. Sure, he could have handled it better. But he didn't. And I really am unsure that the photographic community that seems to be throwing stones would not have sinned in his place.

I wonder the worse sin, freaking out over the theft of your images or a photographic company stealing the work in the first place. As far as I know, only freaking out is not a crime.
Forum: Pentax Medium Format 06-24-2014, 02:27 PM  
645z ISO shots by MT
Posted By Hakusan
Replies: 13
Views: 1,223
Are you condoning theft?
Forum: Pentax Medium Format 06-15-2014, 08:17 AM  
I'm going to make the 645 jump, now a lens question...
Posted By Hakusan
Replies: 18
Views: 2,335
Whether you get the A or FA 120, you will like the results. The only difference seems to be the AF. I had the 67 105mm, but changed it for the A 120--it is sharper and more versatile. With the 105mm, you only have aperture priority and manual exposure, center weighted metering, and the AWB does not work as well.

I had an A 75mm for a short time. It was OK.
Forum: Pentax Medium Format 06-10-2014, 02:49 PM  
Post your medium format photos!
Posted By Hakusan
Replies: 15,869
Views: 2,624,980


Jaquish Gut and Jaquish Island from Bailey Island. 645D and DFA 55mm.
Forum: Pentax Medium Format 06-09-2014, 06:52 PM  
Why not more interest on the 645Z?
Posted By Hakusan
Replies: 98
Views: 9,545
Really, you can't think of great photos that have lots of detail? Sabastio Salgado does not do anything for you? His photographs are really detailed.

BTW, if you pin something to Pinterest, they assume you have copyright to the image and that you can transfer that copyright. You are giving them unlimited use to those images.
Forum: Pentax Medium Format 06-09-2014, 05:34 PM  
Why not more interest on the 645Z?
Posted By Hakusan
Replies: 98
Views: 9,545
Well, if you like ultra wide lenses, the 645D is going to be handicapped or at least expensive. I have the A 35mm, DFA 55mm, A 120mm, and FA 300mm f/5.6 with 1.4X TC. I don't feel limited, but I did come from medium-format film rather than 35mm so the lens selection seems fine and I don't mind the lens speed.

Whatever, format you want to call it, I think the aspect ratio is a more important choice. At least it is to me. I don't really like the 3:2. I find it hard to work with, especially vertically.
Forum: Pentax Medium Format 06-09-2014, 05:04 PM  
Why not more interest on the 645Z?
Posted By Hakusan
Replies: 98
Views: 9,545
Well, it seems like you love medium-format cameras. Sony has been making FF cameras for sometime, but you have never jumped? It seems logical to get a 645Z. You get to share the lenses for your 645N film body. That seems practical.

The question is what would you miss by the change? I had some really great cameras before I bought a 645D. Sold them off and never looked back. I am also doing a lot more work--the money I saved in the first year shooting the 645D in film and processing costs paid for the camera. As far as depreciation? These are cameras, not financial instruments. If you want an investment, I suggest stocks and bonds. I am still shooting my 645D and I do not intend to stop doing that for some time.

Sure, the camera does not make the photographer, but it is interesting how great photographers have great cameras. I tend to shoot more and do better with equipment I enjoy using. Could I do good work with cheap equipment? Sure. But why do I have to? A good camera is going to complement your work, rather than detract from it.

The 645Z does not have a crop sensor no more than the 645N is a "crop" film camera. The 645Z is a 44x33mm format. BTW, it will put your 645N images to shame.

I would also factor in to a purchase a budget for hard drives--the files are going to be larger than your old camera.

I would also ask yourself if you work better in 3:2 or 4:3 aspect ratios. If you like the 3:2, a FF will be better. And if you want fast lenses, FF will be better as well.

But honestly, no one can answer the question but you.
Forum: Pentax Medium Format 06-08-2014, 07:55 AM  
Why not more interest on the 645Z?
Posted By Hakusan
Replies: 98
Views: 9,545
Not surprising. It might be useful to note that DxO mark scores do not factor in the spatial or resolution characteristics of sensors.
Forum: Pentax Medium Format 06-07-2014, 10:00 PM  
Why not more interest on the 645Z?
Posted By Hakusan
Replies: 98
Views: 9,545
Yup, I have used 4x5 and 8x10 view cameras.
Forum: Pentax Medium Format 06-07-2014, 09:46 PM  
A new 645Z rumor
Posted By Hakusan
Replies: 35
Views: 4,753
If the product is still about a month away from release, then the line is still up. If the initial demand has already sold out, then they can adjust accordingly. I am sure Pentax can handle product demand. I am also sure that can handle the other products.
Forum: Pentax Medium Format 06-07-2014, 11:47 AM  
Why not more interest on the 645Z?
Posted By Hakusan
Replies: 98
Views: 9,545
I believe people can pursue whatever they want. There is no qualification required to buy a camera. Insulting people because of some strange personal reasoning is not very helpful. One thing is sure, there is not magical skill you need to use a particular format.
Forum: Pentax Medium Format 06-07-2014, 11:41 AM  
A new 645Z rumor
Posted By Hakusan
Replies: 35
Views: 4,753
Well, if the first production runs sell out, Pentax will do a second. You will get your camera.
Forum: Pentax Medium Format 06-05-2014, 05:57 PM  
Tripod Options Medium Format?
Posted By Hakusan
Replies: 13
Views: 12,222
I use a Manfrotto Carbone 440 three section tripod (I think the Manfrotto 055 series tripods replaced that) with an Arca Swiss P0 ball head. I prefer flip locks to twist locks. I find them to be faster and easier to adjust height. You can also know if they are unlocked just by looking at them. I use this tripod with focal lengths up to 300mm and for exposures in the minutes with a 645D. The Arca Swiss P0 is a great head--small, light, and flexible. I put a short column on my tripod to reduce weight. I need to be able to carry this all day over all kinds of terrain. For indoors, I have a large Gitzo tripod.



I have also used 4x5, 6x12 panorama, and 6x6 cameras on this tripod. Buy a good tripod and one that is going to suit what you need it for and it will last you a really long time.
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