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Forum: Sold Items 02-14-2019, 05:43 PM  
Wanted - Acquired: SMC K 55 f/2
Posted By jbondo
Replies: 5
Views: 171
PM Sent
Forum: Pentax SLR Lens Discussion 01-10-2019, 05:29 PM  
Poll: Which roadmapped and rumored product is your favorite?
Posted By jbondo
Replies: 86
Views: 2,756
The poll only allows one choice. I'd buy the 85/1.4, 35/1.4, DFA 1.4X, DA 11-18/2.8 ALL equally quickly. I suspect I'd use the 35/1.4 most frequently, followed by the 85.
Forum: Pentax SLR Lens Discussion 12-17-2018, 08:46 PM  
50 vs 77
Posted By jbondo
Replies: 36
Views: 1,839
I use both about equally.

Honestly, it often depends on how much space I will have to work with (shooting distance) or if the large physical size of the DFA 50 will not be appropriate for the situation, or if the weather is threatening.
I would say that with my shooting style, a slightly higher percentage of the shots from the 77 are 'keepers' or 'special' compared to the 50.


FA77:
Glorious world-class Rendering.
Downright small and and light. Integrated slide out hood.
Non-intimidating size for sensitive subjects.
Near wide open the color bokeh can sometimes be distracting, and occasionally with specular reflections that are out of focus.
Glorious world-class Rendering. (yes, repeated)


DFA50:
Huge and heavy for a 50.
Very high resolving power at all stops, out to the corners.
More forgiving in extreme lighting conditions.
Much quieter and surer focusing on my K-1s, better for fast action.
Forum: Pentax K-1 12-16-2018, 05:56 PM  
K-1 upgrade delay
Posted By jbondo
Replies: 129
Views: 7,113
Mine shipped as well 2 day express. Should receive tomorrow.
Forum: Pentax K-1 12-08-2018, 10:47 AM  
K-1 upgrade delay
Posted By jbondo
Replies: 129
Views: 7,113
Both of mine show 'in repair' as well now. Not counting on them getting back to me in time for a trip next week, but still nice to know. Just two days ago I bought another K-01 as a temporary measure to get me by.
Forum: Pentax Medium Format 11-10-2018, 10:27 PM  
645 vs 67 lenses for digital conversion
Posted By jbondo
Replies: 14
Views: 937
Another nod to the 400edif f4 (67). Outstanding, though hefty. Can only handhold for about 10 minutes at a time.
Forum: Sold Items 11-03-2018, 11:42 AM  
For Sale - Sold: SMC Pentax-DA 40mm F2.8 XS (Scarce Silver K-5 Limited edition)
Posted By jbondo
Replies: 4
Views: 757
bump.
Forum: Sold Items 11-03-2018, 11:42 AM  
For Sale - Sold: SMC Pentax-A 1:4 200mm
Posted By jbondo
Replies: 6
Views: 860
It's in great condition. Nice copy.
Forum: Pentax SLR Lens Discussion 11-01-2018, 06:29 AM  
Pentax A* 135mm f1.8
Posted By jbondo
Replies: 82
Views: 6,520
Both my K-1's are off for upgrade service. When they get back I'll do a comparo with my A* and the Samyang.


i will say this: I'm on my third copy of the Samyang. The first two had easily visible uneven sharpness between the left and right sides. My third one has a hint of astigmatism. I'm probably unlucky in this respect but none the less, when you are making financial and time calculations, keep in mind that the Samyangs may have the "hidden" cost thus mentioned. My time is valuable, and it's worth a certain amount of money to me to not have to goof around with multiple copies just to get a solid one.
Forum: Sold Items 10-31-2018, 03:03 PM  
For Sale - Sold: Pentax D-AC120 Switching Adapter & D-DC120 Coupler
Posted By jbondo
Replies: 2
Views: 607
PM Sent
Forum: Pentax K-1 10-28-2018, 05:40 AM  
Use of filters and their need and affects on modern DSLRs
Posted By jbondo
Replies: 57
Views: 2,676
I know that everyone has their own unique approach to thinking about how to shoot and I respect that! That's what makes us all individuals.

My particular way of doing things is to break things down in to steps and consider each step in the order they occur. It's not 'right' or 'wrong' per se. It does bring a great deal of clarity to my thinking about what I am doing and helps me make more effective decisions about adjustments.





There are two scenarios here:
1. C-PL is in front of lens

If we expand upon UncleVanya's previous post:



We get:
Sensor | Color Filter Array (CFA) | Lens | C-PL | Light < --------

in this case It's all about what I want to do with the light before it enters my lens - and therefore my use of a C-Pl has no relationship with which lens I am using. I'm already done with thinking about what I want to do with the polarization aspects of the light before I ever start thinking about what I want to do with the lens. The reason for this is because this is the order in which these things occur. I keep them separate.





2. C-PL is behind one or more surfaces with HD coatings (drop-in filter)

Sensor | Color Filter Array (CFA) | C-PL | Lens | Light < --------

In this case the subcomponent of the light that is scattered internally as it passes through the lens may not have the same polarization state. Therefore the C-PL may have reduced modifying capability.



Even though my working style is essentially the same in both scenarios, my mental model is quite different. I think about what the C-PL is doing when it does it.


Now, with all of the above being said, there is a reverse case to consider:
Q: Is there a case when the lack of HD coatings contradict the use of a C-PL?
A: Yes. In extreme contrast situations (high illuminance) especially if both the lens and the C-PL do not have excellent coatings, you can get a lot of internal reflection between the front element and the filter so you're better off not using the filter.
Forum: General Talk 10-27-2018, 06:20 AM  
You command line, I command line, we all command line for Linux. (^o^ ) <3
Posted By jbondo
Replies: 74
Views: 5,371
At work:
I'm a developer. I run quite a few servers, and lots of boxen: I've used all the Ubuntu and Mint flavors for about 4 years now, also CentOS, RHEL, and quite a herd of Raspberry Pi's


At Home:
2x i7 laptops and one really beefy power desktop. Dedicated Mint Kodi i7 media server with quad tuners. Linux based Qnap NAS.


For the Band:
Pair of Linux Mint 19 Cinnamon laptops used by the light and sound engineers.


Favorite:
Linux Mint 19 Mate is my definite favorite 'windows replacement' and I'm in the process of completely migrating off windows. It has been SO pleasing to see how distros in the last couple of years are reaching "just works" status.
Forum: Digital Processing, Software, and Printing 10-27-2018, 05:50 AM  
Memory Friendly Superresolution Script (In python and hugin)
Posted By jbondo
Replies: 35
Views: 1,516
Thank you very much for sharing and describing your work.
Forum: Pentax K-1 10-23-2018, 06:35 PM  
Use of filters and their need and affects on modern DSLRs
Posted By jbondo
Replies: 57
Views: 2,676
Northrup often has pretty good advice. That particular video was disappointing. Yes, there are numerous times when no filter is superior to using one. The cases he made though didn't illustrate the uses of filters when they are most effective. It's as if the all the cases he made were to specifically sell that you shouldn't usually use one. (imagine that...)


A little knowledge about the physics of polarization can go a long way towards getting the best use of one.

- There is no direct substitute in post processing because our consumer cameras don't record raw polarization data, only illuminance.

- The strongest sky darkening always occurs when your shooting axis is at 90 degrees from the sun. (or whatever the illumination is if it's at night.) Shooting near 0 or 180 from the sun especially is often unproductive.. but not always because sometimes bounced light needs to be modified.

- Unless you're intentionally creating an uneven effect, don't exceed 45 or so degree angle of view as you will be unable uniformly apply to all areas in frame.
- Particulate haze and smoke can respond to polarizers in some circumstances, but it depends on the size of the particulates.

- Glare reduction and sky darkening are not the only uses of a polarizer. Tony fails to mention that a polarizer can also positively accentuate reflections and illumination when desired for creative use. - Including eyes.

- Some materials (pearlescents, fine grained sparkles) can respond superbly to polarizers because the nature of the shimmer is from reflecting light from many angles. You can shape the nature of the glimmer.
- I've used DXO Clearview a quite lot, It can be useful, but lacks the nuance possible with a polarizer. I have sometimes use both in the same image because they accomplish things differently.

- Utterly indispensable when you want to blacken a lit LCD screen near your subject. Has saved me from extensive post editing on several corporate gigs, not to mention easier metering.
- Nothing makes a rainbow pop like a polarizer because the internal reflections within the raindrops are different polarization than the surface reflections (but wide angle of view may be a limiting factor.)
Forum: Sold Items 10-23-2018, 04:34 PM  
For Sale - Sold: SMC Pentax-A 1:4 200mm
Posted By jbondo
Replies: 6
Views: 860
Bumpin.
Forum: Sold Items 10-23-2018, 04:32 PM  
For Sale - Sold: SMC Pentax-DA 40mm F2.8 XS (Scarce Silver K-5 Limited edition)
Posted By jbondo
Replies: 4
Views: 757
Bump. Price Drop. It's so much more attractive than the black faced version.
Forum: Pentax K-1 10-16-2018, 07:50 PM  
K-1 upgrade delay
Posted By jbondo
Replies: 129
Views: 7,113
Sigh. I sent both of mine in, I decided my odds were better of not getting cancelled if they actually had my cameras there. Meanwhile it's just me and "Koi" (my K-01) to take photos with.
Forum: Pentax K-01 10-16-2018, 07:44 PM  
Is the K-01 still worth buying in 2018? Hell yes!
Posted By jbondo
Replies: 22
Views: 2,311
The only apsc body I did not sell when I bought a K-1 (two actually) was my black K-01.


People aren't intimidated by it because it doesn't look like a 'serious' body. It's particularly easy to bring into concerts and public events where other bodies would be prohibited.


It's an absolute joy with smallish manual lenses (A50/1.2 my fave) and the limiteds.


It's light weight and mirrorless design makes it great mounted on a telescope.

I won't be selling it any time soon.
Forum: Sold Items 10-10-2018, 05:04 PM  
For Sale - Sold: SMC Pentax-DA 40mm F2.8 XS (Scarce Silver K-5 Limited edition)
Posted By jbondo
Replies: 4
Views: 757
Bump!
Forum: Sold Items 10-10-2018, 05:04 PM  
For Sale - Sold: SMC Pentax-A 1:4 200mm
Posted By jbondo
Replies: 6
Views: 860
BBBump! It's a really nice copy.
Forum: Pentax SLR Lens Discussion 10-09-2018, 04:22 PM  
DA 35mm 2.4 or 50 1.8 for first non kit lens and concert/bar band photography
Posted By jbondo
Replies: 37
Views: 1,318
Fellow Musician (I play in two bands) here.


At smaller / mid sized club venues, and for 3+ member bands

The 35 will have a lot more utility than the 50.

They both have similar light gathering power (even though the 35 is slower, it has a much wider angle of view)
the 35 will be a little more forgiving with focus / DOF


For larger venues (or where you cannot be close to shoot) or smaller 1-2 member bands:
The 50 may be a little better.

Also the 50 can also be better if your subjects are really still and don't move much, you can go for shallow DOF.


Here's a sample vid with 7 camera angles of which 3 are Pentax: K-1(31/1.8) K-1(DAF50/1.4) K-01(8/4 fisheye (de-fished))
Forum: Digital Processing, Software, and Printing 10-09-2018, 03:34 PM  
The Squirrel Mafia's RawTherapee thread. Now with 50% more excellence & win!
Posted By jbondo
Replies: 574
Views: 65,745
Same here. Linux user. I am missing something? I read a long time and was unable to determine where to obtain the dcp files that are repeatedly referred to. Other than that, I am greatly enjoying the program and greatly appreciate this thread.
Forum: Pentax Full Frame 10-04-2018, 08:03 PM  
Which lenses do you use for portraits or do you recommend?
Posted By jbondo
Replies: 91
Views: 5,179
I would consider what your usual/typical working distance is. Do you tend to work in cramped quarters and smaller rooms? Tend to have lots of space to work with? Do you shoot in environments where you need to tightly frame your subject or do you have attractive surroundings you may want to include in frame...


In tight quarters, the 31/1.8 can produce really nice results.
The FA77 is hard to beat within your budget at moderate distances.
Speaking of 135 - I have an A135/1.8, but frequently don't have enough working space to properly frame subjects. I would only get that fixed focal length if you know you will frequently have enough space to use it.
If you don't mind carrying a larger lens, the 60-250 (you'll want a modded copy for full frame) has very attractive bokeh for a zoom and is just above the high end of your budget.
Forum: General Photography 10-04-2018, 03:37 PM  
What rig to carry 2 APS-C DSLR's
Posted By jbondo
Replies: 11
Views: 680
Same Here with a pair of K-1s. I often shoot where lens swapping is risky or impractical (contamination, perilous footing, etc.) One camera usually has a fast autofocus prime (20 - 50mm), and the other occasionally a zoom, or more frequently a specialty lens (like fisheye / long prime / or manual focus) that can't be used in all situations.

When I carry two bodies, I've found the most convenient case to be the messenger style bag. a favorite is is Tamrac 5534 or similar. Will hold a pair of cameras with moderately long lenses attached towards the outsides and can hold a flash or extra lense(s) in the center, still has room for filters in front zipper. A downside of the messenger bags is that they don't stand on end if you set it down.
Forum: Sold Items 10-03-2018, 10:59 AM  
For Sale - Sold: SMC Pentax-A 1:4 200mm
Posted By jbondo
Replies: 6
Views: 860
Bumppity Bump.
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