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Forum: Pentax Medium Format 09-14-2017, 07:47 PM  
Post your medium format photos!
Posted By Thomas
Replies: 11,198
Views: 1,820,781
You have one of the really good 645 lenses.

Have fun and let's see some photos.
Forum: Pentax Medium Format 07-06-2017, 07:16 PM  
Post your medium format photos!
Posted By Thomas
Replies: 11,198
Views: 1,820,781
Eastern screech owl in the hollow of a silver maple. I'm really excited to have this appear in the July issue of Outdoor Photographer:
645Z, 600mm A*.
Forum: Pentax Medium Format 05-03-2017, 05:57 AM  
Post your medium format photos!
Posted By Thomas
Replies: 11,198
Views: 1,820,781
Although I live close to Burlington, no; it's the Wabash river near Huntington, IN
Forum: Pentax Medium Format 05-03-2017, 04:57 AM  
Post your medium format photos!
Posted By Thomas
Replies: 11,198
Views: 1,820,781
My thoughts exactly about the 400 and 150-300mm zoom, both sharp, light and easy to handhold. The 600 is a great lens, but so susceptible to vibration that its use requires considerable care; it's also so heavy that I find myself using it only when the 400 simply is not long enough.



Here are a few using the 600mm:

_IMG4661 copy by tsjanik47, on Flickr

_IMG3741 copy by tsjanik47, on Flickr

_IGP1148 by tsjanik47, on Flickr
Forum: Sold Items 04-04-2017, 01:25 PM  
For Sale - Sold: Pentax K-3 Premium Silver Edition, under 3000 actuations
Posted By Thomas
Replies: 2
Views: 728
SOLD PentaxForums.com Marketplace Listing

Item for Sale
SOLD Pentax K-3 Premium Silver Edition, under 3000 actuations

Asking Price
650.00 USD

Item Location
Dunkirk, NY (United States)

Item Description
Pentax K-3 Premium Silver Edition which includes an unused silver D-BG5 battery grip and all other items as shipped by Pentax. I haven't used the camera very much and the camera has approximately 2900 actuations. I purchased this from Lloyd Chambers who used it for his review on diglloyd.com. Basically a near new camera, the only indications of use are some minor marks on the body.

Are you the original owner of the item being sold?
No

Are you selling or trading this item?
Selling

Item Condition (Key)
Used
Mint

Shipping Destinations
Continental U.S. Only

Shipping Charge
20.00

Shipping Services
USPS, UPS, FEDEX

Accepted Payment Types
PayPal Check/Money Order

Return Policy & Additional Details
No returns unless you convince me it's the right thing to do. Items work perfectly, near new with only a few marks on the body. I will ship insured for the purchase price.

Please send me a private message if interested in the item!
Forum: Pentax Medium Format 03-09-2017, 10:52 AM  
645z viewfinder display problem
Posted By Thomas
Replies: 7
Views: 910
Thanks.. LOL, I expected some complicated macro setup!
Forum: Pentax Medium Format 03-08-2017, 06:44 PM  
645z viewfinder display problem
Posted By Thomas
Replies: 7
Views: 910
Gunner:

I'm glad to hear all is well and the rapid turnaround. How die you manage to get the image through the viewfinder that you posted?

Tom
Forum: Pentax Medium Format 02-08-2017, 01:35 PM  
How Can I tell The difference between the 67 55mm 4.0 NEWER one vs Older one
Posted By Thomas
Replies: 23
Views: 1,303
There are three versions of the 55mm, all of which can be seen here:

Pentax 67 Wide-Angle Primes - Lens Reviews and Specifications - SLR and Interchangeable Lenses - Pentax Lens Reviews & Lens Database

The newest is regarded as one of the best 67 lenses (rating in the database 10)
Forum: Pentax Medium Format 02-07-2017, 10:17 AM  
Question about 600mm A-star lens with 645z
Posted By Thomas
Replies: 14
Views: 1,507
Below is about close focus limit. Flowers about 3 in/8cm in diameter; not sure of the distance. Wide open BTW

---------- Post added 02-07-2017 at 03:46 PM ----------



Almost no CA anywhere; the lens is highly corrected with 12 elements.
Works well with the 1.4x; sold my 2x.
I don't use this handheld very often and even then rest the barrel on something. I use the 400mm handheld frequently, but not the 600. Keep in mind this is a MF lens, so the hand needed to turn the focus ring also must support the lens barrel. My experience is that is very difficult to achieve the quality this lens is capable of using it handheld.
Also, shutter shake is a real issue at slower shutter speeds.

---------- Post added 02-07-2017 at 03:55 PM ----------

Forum: Pentax Medium Format 02-07-2017, 06:37 AM  
Question about 600mm A-star lens with 645z
Posted By Thomas
Replies: 14
Views: 1,507
I wrote one of the reviews and my thoughts remain the same. The lens is even better with a 645Z since the high ISO capabilities allow higher shutter speeds. Recent example attached.
Forum: Pentax Medium Format 01-04-2017, 09:18 PM  
Macro photography with Z
Posted By Thomas
Replies: 7
Views: 1,259
I'm not the person to advise on flash use; the few times I've used flash for macro, I've used a reflector, never direct.
Forum: Pentax Medium Format 01-04-2017, 12:00 PM  
Macro photography with Z
Posted By Thomas
Replies: 7
Views: 1,259
The A or FA versions are superb. You should be able to find an A version under $400. Read the reviews:

SMC Pentax-A 645 120mm F4 Macro Reviews - 645 Telephoto Primes - Pentax Lens Reviews & Lens Database

Ring flash- no idea if it is worthwhile; I prefer indirect lighting for macro.
Forum: Pentax Medium Format 01-01-2017, 01:06 PM  
645z versus X1D
Posted By Thomas
Replies: 41
Views: 4,526
Thanks for the insightful report Carsten. Another option for 300mm is the 67 300mm f/4 M*. The lens is universally regarded as excellent and is a different optical design than the 645 counterparts.
Shutter shake is a serious limiting factor with long lenses at slower shutter speeds; e.g., I've found better results using the 400mm mounted on a tripod at the body rather than at the lens mount. I also built a pretty elaborate lens stabilization system for the 600mm which suffers terribly from shutter shake at slow shutter speed. Image below, and I sometimes add a Manfrotto long lens support to this as well.

_IGP1179 by tsjanik47, on Flickr
Forum: Pentax Medium Format 07-15-2016, 08:02 AM  
645 to K mount adapters
Posted By Thomas
Replies: 12
Views: 835
I have a 3rd party K/645 adapter that had reflection problems. I glued the fuzzy half of black Velcro inside and that helped tremendously.
Forum: Pentax Medium Format 07-14-2016, 08:58 PM  
Comparison shots between 645D/645Z and K1
Posted By Thomas
Replies: 34
Views: 3,982
Rick:

I looked at some of your FB images; some very nice images there. My experience has been that Facebook is not the place for fine photography; display is not good and depending on your audience, most viewers aren't that interested.

Tom
Forum: Pentax Medium Format 07-14-2016, 06:58 PM  
Comparison shots between 645D/645Z and K1
Posted By Thomas
Replies: 34
Views: 3,982
Thanks for the detailed reply Rick. I value your observations. I like to have a camera with me all the time and the 645 Z system is sometimes bigger than is practical for some applications. The lack of true ultra wides in the 645 system is a problem too. I tried a Sigma DP2, great files but just too limiting for an everywhere camera. I'd like to think I could carry a K-1 and feel it is almost the quality of the Z.
Before I switched to digital, I worked with TIFF files from 67 scans and yes they certainly are less malleable than the amazing current RAW files. Can you process RAW files before applying pixel shift, much as you can do in Bridge before a stitch etc.? Can you open a single exposure in the pixel shift set and place it underneath a pixel shift processed file and then mask the moving portions of the pixel shift image? I'd like to hear any further thoughts you have and some images.

Tom

NB didn't see above response before posting
Forum: Pentax Medium Format 07-14-2016, 02:33 PM  
Comparison shots between 645D/645Z and K1
Posted By Thomas
Replies: 34
Views: 3,982
I have a D and Z as well and agree entirely with your thoughts. Yes, the ISO of the Z is a real advantage when need. I like to use TAv mode when handholding and don't worry about the ISO the 645Z uses. Since the D seems a bit redundant for me so I'm considering selling to fund a K-1. Here's a shot I took yesterday with the Z and a 400mm FA. Handheld, heavy crop, 1/800s, ISO 3200; can't do that with the D.

Tom
Forum: Pentax Medium Format 07-14-2016, 05:27 AM  
Comparison shots between 645D/645Z and K1
Posted By Thomas
Replies: 34
Views: 3,982
This post prompted me a take a look. I'm considering selling my 645D and replacing with a K-1. I am somewhat surprised to see that (to my eye) then 645D still has the edge over the K-1 at least without pixel shift. No contest with the 645Z.

Tom
Forum: Winners' Showcase 07-09-2016, 06:11 AM  
July, 2016 Winner: Microburst
Posted By Thomas
Replies: 47
Views: 3,076
Rapidly approaching front at the Lake Erie shore produces a microburst. The strong downdraft of wind distorts the edge of the clouds.
Forum: Pentax Medium Format 04-27-2016, 07:49 PM  
645z with 120 F4 Macro: Manual or Auto Focus?
Posted By Thomas
Replies: 13
Views: 1,073
The A is manual focus, so if you want to rely on AF, yes. It is also slower at f/3.5 vs. f/2.8 for the FA version. That said, if you are comfortable that you can focus the lens and don't need the high speed and limited DOF of the FA, it's a great lens.
Forum: Pentax Medium Format 04-26-2016, 06:31 PM  
645z with 120 F4 Macro: Manual or Auto Focus?
Posted By Thomas
Replies: 13
Views: 1,073
I have the A and FA 120mm lenses. I'll second Adam's comments: for macro, the long focus throw of the A is better. Optically, I see no difference. For portraits the 150 is a better choice (and that includes the very inexpensive A version).

Tom
Forum: Pentax Medium Format 03-03-2016, 05:55 AM  
Long Lenses on 645z
Posted By Thomas
Replies: 22
Views: 2,096
Sharp telephoto shots can be a challenge. Zoomed live view should allow you to determine if focus or wind induced movement is a cause. The shutter opening is a real problem at slower speeds, note Ross' comment about using the 400mm mounted on a tripod at the body rather than the lens. That has been my experience as well. I built a pretty elaborate long lens support, which is effective, but a pain to use(if interested it's in my review of the 600mm A*). The cropped shot below was taken without that support with the 600mm + 1.4x at 1/200s. It's acceptably sharp and I used a technique I learned while using the Pentax 67: I compose, tighten the head and lean my body weight on the camera using your hands and mass to dampen the shutter vibrations. This works most times for the really troubling speeds of about1/30-1/500s)

_IGP1004 by tsjanik47, on Flickr
Forum: Pentax Medium Format 03-02-2016, 07:41 PM  
Pentax 67 lens recommendations
Posted By Thomas
Replies: 18
Views: 1,929
I wouldn't dismiss the 500, it is sharp, but suffers from CA, which is largely correctable if you digitize. It is light and easy to handle (by MF long lens standards). Finding one might be a waiting game, but my experience is that the 500 is better than the 300mm ED with a 2x or a crop of the 300. I never used the 400 ED, so I can't compare.
Forum: Pentax Medium Format 02-27-2016, 05:11 PM  
Now that we have the K-1
Posted By Thomas
Replies: 12
Views: 1,577
The lack of super wide lenses is, for me, the only serious liability of the current sensor size. That said, imagine the output of a 645ZII with pixel shift.
Forum: Pentax Medium Format 02-15-2016, 08:20 PM  
Tripod head for 645Z
Posted By Thomas
Replies: 57
Views: 4,047
Just my experience: I have an Acratech Ultimate and a Arca Z1. I find it very difficult to use the Acratech with the 120 macro and other heavy lenses because of creep; it's fine if the lens is not heavy and the camera is not tilted. The Z is a much better head with heavy lenses and is my first choice.
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