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Forum: Pentax SLR Lens Discussion 3 Days Ago  
400mm Legacy Primes (Tokina & Pentax)
Posted By Henrico
Replies: 10
Views: 691
Beautiful pics Driline, color of the first picture is superb! Focus is spot on the nose of the dog. The second picture seems sharper on the tail of the dog. Focusing these lenses is tricky with so little DOF.
Forum: Pentax SLR Lens Discussion 4 Days Ago  
400mm Legacy Primes (Tokina & Pentax)
Posted By Henrico
Replies: 10
Views: 691
I do not own the M400, but I do have and do use the RMC400 and A400. The A400 has two more lens elements so I suppose it performs better than the M400. My experiences are that the A400 has more contrast than the RMC400 does. The A400 is a bit sharper using the same aperture and frings a bit less.

Shots taken with both lenses need to be post processed. I The darks and highlights in the histogram often are flat bottom lines, I compress these with the curves and levels functions in photoshop so that the histogram stretches up. Giving it a bit more contrast does the final job. At all apertures these lenses show aberrations (though different colors), the wider you shoot, the more the fringing. This also mostly is correctable in post.

I reviewed both lenses, you can find more reviews here on this site. I scored them both a 9, taking in account the RMC400 is four times cheaper than the A400 is.

So I think performance wise the M400 and RMC400 are rather similar. Both are sturdy build, the RMC has internal focusing, focuses nearer by and is more compact.

The RMC is an underrated but decent lens, even better on FF than on APC-C because of a larger pixel distance. If I were you I should skip the M400 and save money for a real upgrade, something like a DA300 or so.

Cheers!
Forum: Troubleshooting and Beginner Help 01-08-2021, 02:06 PM  
Tokina 17mm RMC f3.5, fungus/haze or not?
Posted By Henrico
Replies: 13
Views: 540
I cleaned some manual SMC lenses myself, I bought me a lens tool spanner at Alibaba for little. When you have some fine technical skills and can be patient it is not that difficult. Take photo's of your disassembling steps. Most lens elements can be easily removed, clean everything with fine tissues and pure alcohol and wrap it up with a clean cotton handkerchief. The coatings mostly are very tough and will not be much damaged of this cleaning. Also clean the inner metal parts as much as possible with alcohol, be careful with the aperture blades. Blow out all the dust with a warm hair dryer. The inner dirt is often a mixture of moisture, fungus, dust and evaporated oil. Re-assemble it the other way around, when you are lucky your lens is as new. In case you mess it up you have a nice press papier...
Forum: Repairs and Warranty Service 01-06-2021, 02:33 AM  
K-01 shutter stuck
Posted By Henrico
Replies: 11
Views: 807
I couldn't resist a sale offer for a brand new black KP for 799 with the three grips. Now in the learning curve... Owning also a K1ii the menu's and buttons are familiar. The four real differences are portability, format, pixel density and a build in flash.

I really like this little camera, specially with compact lenses. I got pixel sharp results using the M20, M28, XS40, M50, M100 and M200 stopping them one or two steps down.

Maybe I will disassemble my K-01 once to find the error, the stepper motor seems OK (opening aperture when putting it on) so it might be the shutter that passed away. In case someone has the same issue and got it fixed easily, I would appreciate a post here on this thread... :)
Forum: Troubleshooting and Beginner Help 01-06-2021, 02:09 AM  
SMC Pentax-M Zoom 75~150mm Front lens Group Removal.
Posted By Henrico
Replies: 2
Views: 357
I do not own that lens but it seems to be the same construction (build in sun hood) as my A400 that had the same problem. I did a post about it how to disassemble it:

Dissambling A 400 5.6 - PentaxForums.com

Maybe that leads you to solve this issue.

Succes!
Forum: Pentax KP 12-23-2020, 04:45 AM  
New KP with light weight M lenses
Posted By Henrico
Replies: 11
Views: 1,111
@iheiramo, all, thnx for your replies.

Pictures shown here on the forum are just 1280 x 850...

As mentioned I used the entire dynamic range (DR) of the histogram to develop the shots. That logically results in lower contrast that I push up a bit in post. I also set sharpening and noise reduction in Adobe RAW on zero to achieve a clean16 bit basis in post. In PS I only use low sharpening (500% / 0.2 / 2) in unsharpening mask to avoid artifacts. So I avoid unreal sharpness as much as possible. That is the paint-style of those images.

By using the entire DR in back-light situations there always are some "DR artifacts" in harsh situations (black tacks against a bright sky). But I was surprised how much even my cheapest M28 could resolve in such challenging scenery.

I put a 100% crop of the back light shot that shows the true sharpness that little lens delivers...
Forum: Pentax KP 12-22-2020, 01:39 PM  
New KP with light weight M lenses
Posted By Henrico
Replies: 11
Views: 1,111
Last week I got my new KP as a replacement of my good old K-01 that passed away with a shutter stuck...

This Saturday I went out with it early in the morning on a dull winter day . I took some old light weight M lenses with me and took some shots with them most of the time two stops down. I shot RAW and developed those to JPG's trying to recover as much as possible that was caught in the dynamic range. So where the out of camera JPG's showed bright skies I stretched the capture range to get some texture in the bright clouds and dark fields. That results in paint-style pictures that I really like.

I was surprised that even at a 24 MP cropped sensor these old cheap lenses deliver enough sharpness stopped two clicks down. Even my M28 delivers very crispy and contrasty pictures at the 5.6 - 8 range.

I think my KP and I will become good friends when I want to travel light. Manual focusing feels even more spot on than on my K1ii.

Some shots I took can be found here: Henrico's Album: New KP with M-lenses - PentaxForums.com

Enjoy!
Forum: Pentax Film SLR Discussion 10-22-2020, 12:31 AM  
Quick Photo trip today: K2 and MX
Posted By Henrico
Replies: 7
Views: 730
Nice legacy on the rocks there...

But.., 28 mm should be mounted on your K2 and the 50 on your MX.... :)
Forum: Repairs and Warranty Service 10-07-2020, 04:00 AM  
K-01 shutter stuck
Posted By Henrico
Replies: 11
Views: 807
Thnx photogem, I better first assess what's wrong inside the camera...
Forum: Repairs and Warranty Service 10-07-2020, 12:01 AM  
K-01 shutter stuck
Posted By Henrico
Replies: 11
Views: 807
Shutter count is 15k, not that much...

I like the K-01 for the looks and because it's the only mirrorless camera with full K-support. I use it most with the small M-lenses (20, 28, 35, 50, 85, 100, 135 and 200 mm's). Those lenses are small and perform real good on the smaller APS-C format. My K-lenses found home on my K-1ii. The K-equivalents often perform better on full frame simply because there is more glass in it. The M-lenses have great looks on my white K-01, and a glued a "Hoodman Pro" on it to make manual focussing spot on with the 6x magnify function. So I like my K-01 a lot, I certainly will try to fix it.
Forum: Repairs and Warranty Service 10-06-2020, 01:49 PM  
K-01 shutter stuck
Posted By Henrico
Replies: 11
Views: 807
Thnx photogem, very helpfull sites. Problem on my K-01 is that the mechanism that has to shut down the aperture seems to be lame. I can move it up and down with my finger without giving much resistance. Totally different with my K1. Putting on a lens on it (M-lens or XS-lens) results in an unfinished aperture cycle, the aperture pin of those lenses causes too much resistance and also the shutter is not fulfilling its cycle because of that. Shooting without a lens on it works fine, the pin has no work to do, the shutter works fine and snappy. So for sure it has to do with the electric aperture mechanism that feels lame. Something inside is broken or the stepper motor does not function anymore.

When I have the guts, and am in a relaxed mood, I will open my camera to inspect whats wrong with it. Or maybe I will bring it to a local repair shop with the gathered information here, very helpfull those disassembly instructions.. Thnx!
Forum: Repairs and Warranty Service 09-28-2020, 12:03 PM  
K-01 shutter stuck
Posted By Henrico
Replies: 11
Views: 807
I think my last reply did not made my point; my K-01 shows symptoms os the solenoid aperture stuck, but it seems not to have one...

To fix it, should I replace the stepper motor ?

Has anyone ever disassembled a K-01 ?
Forum: Repairs and Warranty Service 09-23-2020, 04:12 AM  
K-01 shutter stuck
Posted By Henrico
Replies: 11
Views: 807
After the K20D all Pentax semi-professional bodies had no more solenoid but a stepper-motor which hardly ever breaks! It seems the K-01 does not have the green solenoid but has a stepper-motor.

Is that really the case, and so, is that the part that has to be replaced?

disassembled pentax K-01 - Google Zoeken
Forum: Repairs and Warranty Service 09-22-2020, 01:47 PM  
K-01 shutter stuck
Posted By Henrico
Replies: 11
Views: 807
Unfortunally my K-01 shutter mechanism starts stucking. It shows all symptoms of the solenoid issue.

The K-01 is same generation camera as the K-30, but seldom mentioned for the Chinese "green" solenoid issues because it seems to use a different mechanism.

Has anybody experienced this issue also at a K-01 and is it reparable?
Forum: Pentax Full Frame 09-08-2020, 05:54 AM  
1000mm and 1200mm lenses
Posted By Henrico
Replies: 27
Views: 2,614
My longest lens is 400mm. I hesitate investing in legacy longer lenses because of sensor reflection issues. I found a thread about this at #Arkive: CK's Lens Post: Super-Multi-Coated Takumar 1000mm f/8: Adapted Lens Talk Forum: Digital Photography Review

Has anybody used legacy extreme teles on modern DSLR's and issued this reflections too?

Such old long lenses need to be stopped down for acceptable IQ, wide open there might be little advantage compared to expanded 400mm shots.
Forum: Pentax Full Frame 09-02-2020, 06:01 AM  
Poll: Why did you go full frame?
Posted By Henrico
Replies: 240
Views: 12,289
Yep

I know FF is 24x36, an image circle of a FF-lens surrounds this 2:3 frame completely, so has a diameter of approximately 44 mm. How exiting should it be having a digital sensor in a K-body that covers this circle completely (44x44 m) and you can choose the frame afterwards: Round 44 mm, 36x24, 40x20, 30x30, portrait or landscape.

I mentioned 36x36, but that is even too small for that. You need 44x44 mm for total capture of a FF image circle.
Forum: Pentax Full Frame 09-01-2020, 06:35 AM  
Poll: Why did you go full frame?
Posted By Henrico
Replies: 240
Views: 12,289
I use both, but when portability is not an issue I grab my K1. I can use my legacy wide and/or bright lenses for what they were made for.

In case once it would come to a K-mount MILC with 36x36 sensor with adjustable crop function I would buy one when it is not too expensive... The holy grale for all my K-glass.
Forum: Film Processing, Scanning, and Darkroom 08-19-2020, 11:00 PM  
My best methodology for film scanning with RAW-camera
Posted By Henrico
Replies: 36
Views: 6,443
Well done Titrisol! These large formats indeed contain lots of detail. Lens imperfections of gear that days were less critical in that way of shooting. I copied B&W family photos of 100 years old on a Epson flatbed and was really surprised about the quality of it.
Forum: Pentax News and Rumors 07-11-2020, 04:16 AM  
New APS-C is
Posted By Henrico
Replies: 1,045
Views: 73,737
The amount of light caught by the lens itself, related to the focal length and frame size, finally limits the brightness you can see in an OVF. Because of that I think the finder on this K-new with a 35mm F2, despites its 105% FoV, will be one stop darker than a K1 with a 50mm F2. Neither of this cameras will be as bright as the old maual focus film cameras were (ME super generations) because of the transcendant mirror. Or am I wrong here?
Forum: Pentax News and Rumors 07-04-2020, 01:12 AM  
New APS-C is
Posted By Henrico
Replies: 1,045
Views: 73,737
That's the main issue camera sales dry up... The gear all brands produce now simply is that good that investing in new doesn't make you shoot significant better pictures. The boost in quality jumps is over.

The jump from film to digital was immense, not only picture quality but maybe more the total difference in processing. Did we had discussions about what was better, analogue or digital, with the first 10Mp+ cameras that was decided soon too.

Succesively I used the Nikon Coolpix 900S, Olympus Camedia C4000, Sony R1 (marvelous camera btw, I still use this today as an all in one package for travelling), Pentax K-01 and K1ii. The latter two out perform most of my glass (30 lenses, K,M,A,DFA).

The only real thing I missed with my K-01 is the effectiveness of my full frame lenses for what they were made for in the analogue aera (wide angles, DOF etc.). The K1ii brought me that too and I am complete happy with it now.

Years ago I glued a Hood Man on my K-01 to make it a perfect EVF camera with K-coppling. Ideal for pin point manual focussing on tele's and fast lenses wide open. You can find a thread of it here on PF. This works more accurate than the OVF on the K1ii (!).

The only reason I sometimes still shoot with my old ME-super is the fun of full frame compactness, the bright viewfinder and the high quality mechanic feeling. But that's emotional driven...

So I see myself investing first in HQ-new glass now. The appearance of the DFA's 50 and 85 are great and I think the right strategy of Ricoh. Because of their low cost R&D, marketing strategy and renewal rate on cameras Ricoh is less vulnerable for market conjucture. I really wish Ricoh is able to produce new K-mount gear for a long time in a low but steady frequency to stay up with new innovations that really improves photography.

The drive to renew my stuff to improve my photography has shrinked because it's that good already now...
Forum: Lens Sample Photo Archive 07-01-2020, 11:50 AM  
K1ii + A400 Sunset at Verklikker Beach, Zeeland, Holland
Posted By Henrico
Replies: 1
Views: 354
Forum: Post Your Photos! 07-01-2020, 11:30 AM  
Nature K1ii + A400 Sunset at Verklikker Beach, Zeeland, Holland
Posted By Henrico
Replies: 1
Views: 318
Just a surprising walk last week in the dunes and on one of Holland's most quiet and beautifull beaches with my good old 400 mills. Pictures develloped from RAW with some level adjustments.
Forum: Pentax News and Rumors 05-16-2020, 04:01 AM  
New APS-C is
Posted By Henrico
Replies: 1,045
Views: 73,737
What to think about a smartphone holder that fits the flash shoe or so?
Forum: Pentax News and Rumors 05-15-2020, 01:33 PM  
New APS-C is
Posted By Henrico
Replies: 1,045
Views: 73,737
Having a K1 this camera is it's small version on steroids (I hope, waiting for specs). All buttons are right on the same place.

A fixed back screen will not be a strong selling point, maybe the relative big top screen could be used for live view also? All we can do is sit and wait...

Ricoh's philosophy I think is to support the Pentax user base with only real neccesary updates from time to time for K-mount without loosing money. Doing so they stay connected to imaging devellopments. They have no ambitions to compete with the market leaders. Interesting is what future 645 has, I guess it will disappear just like Q.

I still use my K1ii and K01 frequently with modern and old manual lenses. I like both cameras a lot and they produce state of the art pictures. I like the robustness of the bodies, they never let me down.

Besides my smartphone I often also take my old Sony R1 with me during travelling abroad. It is slow and clumsy but with the fixed CZ 24-120 it makes beautifull 10 Mp pictures in normal circumstances. The EVF and articulating screen at the top of the camera are clever designed. It's a quiet mirrorless sneaky tool that takes nice pictures of your children without they are noticing it. That's not gonna happen with this K-new...
Forum: Pentax SLR Lens Discussion 01-06-2020, 02:07 PM  
Pentax - A 400mm F2.8 insanity.... advice
Posted By Henrico
Replies: 31
Views: 1,838
This could not been sold as "excellent", it has flaws. The seller should have known this.


The crack is on the far outer side of the frontlens, isn't it? As being a tele, a crack in the front lens is by far out of focus and barely visible on the sensor. Because it also is on the outer side, it will only affect IQ using the lens wide open on full frame. And because it is only a very small percentage of the total surface of the front lens I suppose it doesn't reduce visible IQ at all. It is more a annoying cosmetic issue.


Most likely the front lens was cracked in a attempt to remove it. Maybe to remove haze or in a attempt cleaning the blades. Unscrewing its front ring, a front lens still can be stucked in its packing. Worse thing you can do is trying to whipe it out using something sharp. You have to remove the glass with a sucker.


Sticky aperture blades can be cleaned by a professional. Because it is not an autofocus lens this might be easely done. With proper blades this lens will perform like new. But you payed a lot of money...
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