645D and FA645 120mm/4 Macro Lens...Amazing!

Started Dec 4, 2010 | Discussions
laopai Regular Member • Posts: 273
645D and FA645 120mm/4 Macro Lens...Amazing!

First picture, a night shot from Twin Peaks of San Francisco.

Second picture, a 100% crop from the center area of the first picture.

Third picture, 100% crop of the bottom right corner of the first picture. The VERY corner!

Amazing, isn't it?

Pete Fang Senior Member • Posts: 1,900
Please stop this...

Please stop this, my friend. You know that I have the FA120mm Macro and I know that it shines even when mounted on a K20D. Now do I want to spend $10K to compliment a $500 lens???

Seriously, your image and the crops speak for themselves. The detail is astonishing. Do you think this is partly due to the lack of an AA filter in the 645D? I wonder if you've encountered any moire issues in real world use. We don't sit around shooting test charts so I only care about real world scenarios.

Peter

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Peter Fang - Pentax user for more than 25 years: K-5 / MZ-S / Z-1 / SFX / LX
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jamesm007 Veteran Member • Posts: 5,793
Re: 645D and FA645 120mm/4 Macro Lens...Amazing!

This is insane. I kept going back and forth on that corner crop in dis-belief. Look at the size of the pic and the area thats in it and in the crop I can see wires and small details clearly.

No wonder DPR is posting pics. To give them an excuse to use the darn thing. Brand aside, it's built like a tank, is fully WR (what about lens?), and handles like a PRO FF dSLR, just a bit larger but still hand-holdable. According to those lucky enough to use one.

Thanks for posting.

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Raybo Regular Member • Posts: 450
Re: 645D and FA645 120mm/4 Macro Lens...Amazing!

This is all a joke..............Right?

This is just beyond what I have seen..........Yikes!

Simon97
Simon97 Veteran Member • Posts: 3,282
DPreview sample pix up

Looking at the studio shot looks like some macro mode. You can see the half tone dots in the VW Beetle pic, threads in the fabrics and look at the detail in the etching of the face!

Aside from the incredible resolution, IQ is very high as DXO has found. This camera means business!

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(unknown member) Senior Member • Posts: 2,137
Re: Please stop this...

Pete Fang wrote:

Please stop this, my friend. You know that I have the FA120mm Macro and I know that it shines even when mounted on a K20D. Now do I want to spend $10K to compliment a $500 lens???

After seeing these and the DPR images, it's prolly just gone up a few hundred dollars in Ebay prices.

bazz.
---
Zooms? pfffft!

RogerMexico Contributing Member • Posts: 861
Re: DPreview sample pix up

How many second mortgages are now under consideration?

kevinschoenmakers Contributing Member • Posts: 637
Re: 645D and FA645 120mm/4 Macro Lens...Amazing!

There isn't a whole lote more to say than.. wow!

geoson Senior Member • Posts: 1,054
Re: DPreview sample pix up

How many first mortgages are being delayed?

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Raybo Regular Member • Posts: 450
Re: 645D and FA645 120mm/4 Macro Lens...Amazing!

I "think" I know where this image is located on the original (bottom right and I had to look real hard) and it still blows my mind!

moving_comfort
moving_comfort Veteran Member • Posts: 8,242
Re: 645D and FA645 120mm/4 Macro Lens...Amazing!

Wow.

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henricoo Regular Member • Posts: 101
f16.....

Very detailed indeed!

Is f16 the sweetest aparture for this lens? In 35 mm terms f16 is over the top...

Does it perform even better at f5.6 or f8?

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paulkienitz
paulkienitz Veteran Member • Posts: 5,437
Re: DPreview sample pix up

I do believe their studio setup has finally run out of usable detail. I couldn't really find anything in the picture tiny enough to push the limit of the 645D -- all the feathers and threads it could see were still visible in the much coarser K-5 images.

Also, a camera this big has shallow enough depth of field that some of the bits of the test scene are noticeably off focus.

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Rod McD Veteran Member • Posts: 7,675
Re: 645D and FA645 120mm/4 Macro Lens...Amazing!

Hi there,

Thanks. Nice shot, and a deserved reward from the investment in the camera......

The result doesn't actually surprise me. If APSC users WEREN"T saying 'wow', there would be something dreadfully wrong. I used to shoot with the Pentax 645 film camera and would want this from a MF camera. It should be a lot better than APSC. It doesn't matter whether it's film or sensor - size matters for both resolution and DR. The 645D sensor area is almost 4X that of the K5 and the 120mm macro was one of the best of the 645 film lenses. And don't forget that the film lenses were designed with an appreciably bigger image circle than the 645D requires, so the corner is nowhere near the edge of the lens's FOV. Add to this that it's an infinity shot - there was no DOF difficulty even with a 120mm optic.

If only I cold afford one.......

Cheers, Rod

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mauritsvw Senior Member • Posts: 1,042
Another viewpoint...

Interesting discussion in the News forum about MF. One guy's viewpoint here:

http://forums.dpreview.com/forums/read.asp?forum=1000&message=36845110

"I'd imagine it's pretty much like every other MF back I've shot, including some using the same sensor as the 645D. Under ideal conditions, at the one "magic aperture" where lens diffraction exactly balances aliasing, it will "deliver superior resolution performance". At larger apertures, you'll either have images ruined by aliasing, or resolution limited by software aliasing removal. At smaller apertures, you'll end up with comparable resolution on the MF and FF gear.
Physics bites. "
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sandy b
sandy b Veteran Member • Posts: 9,670
thats stunning.

The detail just goes on and on

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MGrayson Regular Member • Posts: 499
Re: Another viewpoint...

mauritsvw wrote:

Interesting discussion in the News forum about MF. One guy's viewpoint here:

http://forums.dpreview.com/forums/read.asp?forum=1000&message=36845110

"I'd imagine it's pretty much like every other MF back I've shot, including some using the same sensor as the 645D. Under ideal conditions, at the one "magic aperture" where lens diffraction exactly balances aliasing, it will "deliver superior resolution performance". At larger apertures, you'll either have images ruined by aliasing, or resolution limited by software aliasing removal. At smaller apertures, you'll end up with comparable resolution on the MF and FF gear.
Physics bites. "
--
Maurits

Be careful of arguments that prove too much. (There is a wonderful proof that all horses are the same color). Diffraction applies to film as well, and no one ever said MF and LF film wasn't a huge improvement for landscape photography. I have no idea how wide apertures and aliasing could interact, even in theory. I generally agree with the author of the above comment, but I think his desire for argument got away from him here.

My own concern is that if the 645D only offers increased detail, that may not be enough. MFDB's reputation is based on "smooth transitions" and wide dynamic range. If FF sensors equal them now, then the extra megapixels may not justify the handling deficiencies.

Matt

Simon97
Simon97 Veteran Member • Posts: 3,282
Re: DPreview sample pix up

Image resource also has their studio shots up. They compared it to the FF Canikons. The 645D is resolving the threads in the fabrics swatches and fake plant leaves where the others are not. This camera will make some nice large prints!

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Tom47 Junior Member • Posts: 49
Re: f16.....

henricoo wrote:

Very detailed indeed!

Is f16 the sweetest aparture for this lens? In 35 mm terms f16 is over the top...

Does it perform even better at f5.6 or f8?

Yes. I have the FA and A versions of this lens and as tempting as it is to use it at f16 or smaller to increase DOF for macro shots, diffraction starts to take its toll around f8.

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(unknown member) Veteran Member • Posts: 9,549
Re: 645D and FA645 120mm/4 Macro Lens...Amazing!

That looks great.

The DPR samples do too. Super clean and sharp at %100. If I were serious about shooting landscapes and wanted to print at 4 feet across or so I'd have to use something like this (or if I were shooting fashion or advertising perhaps).

That portrait of the man, at full size, looks like a great macro of his whole face. So much detail I think that the computer cant quite handle downsizing it automatically for the browser without creating artifacts that look like cookie crumbs on his lips.

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John Krumm
Juneau, AK

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