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Forum: General Photography 3 Days Ago  
What is the actual benefit of mirrorless?
Posted By Lowell Goudge
Replies: 126
Views: 3,853
The problems I see with renewables, that I see is the footprint required for the total power needed and the fact that you need up to 5 times the peak capacity to insure you can actually meet the load demand, considering wind and solar, and that efficient storage modes donít really exist. I donít disagree to some extent about nukes, but in hind sight I think that each of the three major incidents in the world were completely preventable. Also regardless of generation, the batteries are not exactly a clean eco friendly product especially at the production source, and there is also an issue of disposal and recycling

We would be better off with switching to hydrogen as opposed to electric cars in my opinion, and use hydrogen as the storage medium for balancing out the difference between when you can generate energy vs when it is needed. You can also use existing electric grid, to transmit electricity from the source to the user location and generate hydrogen at or close to the point of sale. I believe Germany is already doing this.

Again I apologize for hijacking the thread
,

---------- Post added 09-14-19 at 07:23 AM ----------



I canít argue there, :lol:
Forum: General Photography 4 Days Ago  
What is the actual benefit of mirrorless?
Posted By Lowell Goudge
Replies: 126
Views: 3,853
I did the same basic calculation for Canada a few years ago, and came up with a need to have an installed generation capacity of 19GW continuous, to replace the gasoline used daily in Canada. I find the numbers you have to be perhaps Over stated, the German population is 83 million compared to Canada at 35 million, so a little over 2:1 and I am quite certain that Canadians are on average driving bigger less efficient cars, and driving them further on average, than Germans, so I would like to know how you came up with 10 times the required installed capacity to charge the cars.

I made my estimate based upon the gasoline consumption published at the time of I think 110million litres per day at an average latent heat to mechanical power conversion of 25% (diesels I know can approach 40%) and assumed for electric cars a net efficiency of 80% to cover charging efficiency, power conversion losses in the vehicle drive package, and motor losses etc.

But regardless, it is a big new investment in guaranteed generation capacity, the only way i can see it happening is a rethink of nuclear. The reduction of fossil fuel electricity generation has largely been achieved by reduced demand by improvements in efficiency, specifically lighting, air conditioning, and electrical appliances. To illustrate this point, I have lived in the same house for 35 years, and use less energy now, than 35 years ago, even though we now have 2 fridges in place of one, central air vs no air conditioning, and a lot more electrical stuff plugged in all the time, like computers, wifi and network gear........ while at the same time upgrading windows and insulation (this reduces cooling loads)

But, I suspect there is not much room for further improvement, and all my efforts really have done is to help maintain the status quo as the population in Canada increased by 30%.


To the op, sorry for hijacking the thread
Forum: Troubleshooting and Beginner Help 4 Days Ago  
Can a faulty battery cause a DSLR to behave erratically?
Posted By Lowell Goudge
Replies: 33
Views: 1,240
To answer the question in a word, yes.

I forget now if it was the K5 or K7 but I had a low battery, and at just the right voltage that the camera would still work, but the thumb wheel function became erratic when zooming in and out when viewing photos.

The battery depleted threshold was set too far below the sensitivity functional threshold of the encoder / contact input for the thumb wheel leading to very erratic zooming in and out. Normally one click on the thumb wheel was not one step in magnification but full zoom in or out. I canít recall whether autofocus worked or not by that point, I just changed batteries
Forum: Pentax DSLR Discussion 09-07-2019, 05:12 AM  
K-mount/F-mount mechanical differences
Posted By Lowell Goudge
Replies: 13
Views: 907
I have a t mount adaptor for my celestron C90 scope. Much smaller than the 43mm diagonal of the full frame image but there is no vignette game

I like others here is confused about the issue.

But if you insist on an adaptor take a flanged M42 adaptor to the shop to use.
Forum: Post Your Photos! 09-02-2019, 01:23 PM  
Machinery Marconi auto museum pt 2
Posted By Lowell Goudge
Replies: 5
Views: 233
The 64 falcon got my attention. I had a 64 falcon Futura convertible. It came with a 260V8. Black with red interior. The 260 died and I put a 351 Windsor 4BBL into it. Bigger is better, right.
Forum: Photographic Industry and Professionals 09-02-2019, 01:19 PM  
Nikon follows Sony in cooking raw files for mirrorless cameras
Posted By Lowell Goudge
Replies: 32
Views: 1,743
On a dslr the issues ar different we were discussing here a mirrorless camera with geometrically distributed artifacts due to camera design

Do you want to be fixing that on every image, I donít.
Forum: Photographic Industry and Professionals 09-02-2019, 06:07 AM  
Nikon follows Sony in cooking raw files for mirrorless cameras
Posted By Lowell Goudge
Replies: 32
Views: 1,743
I don’t get this discussion. If there are technical issues, that necessitate a specific amount of processing, even on RAW files, why on earth would anyone want to fix these issues frame after frame after frame. Are you suggesting that the individual photographer is better at, or smarter than the camera designer in understanding the technical flaws.

For me, this is work for the sake of work, not anything related to producing a fine image.

For me, if you want raw, it is because you want to have the advantage of higher resolution in the colours, be it 12- 14 or 16 bit color, compared to the 8 bit limit of jpeg, or you have a specific, constant process that you apply that is not on the camera, but let’s get real here. If you expose correctly, and treat your jpeg settings the same way you would have treated film, for those of you who remember what that flimsy plastic thing in the round cylinder was, there is nothing wrong with jpeg
Forum: Pentax Camera and Field Accessories 09-02-2019, 05:57 AM  
Could you tell me what this is?
Posted By Lowell Goudge
Replies: 6
Views: 709
Even easier to fit, take the viewfinder cover for a dslr remove the mount from the right angle finder and screw the viewfinder cover with appropriate holes in this place
Forum: Troubleshooting and Beginner Help 08-30-2019, 11:20 AM  
Shake Reduction performance depending of shutter speed. Question
Posted By Lowell Goudge
Replies: 14
Views: 747
the K10 by comparison is the loudest camera i have ever heard
Forum: Pentax SLR Lens Discussion 08-30-2019, 06:47 AM  
Why persist in using legacy manual lenses
Posted By Lowell Goudge
Replies: 141
Views: 5,702
i wont claim to have read even a fraction of the posts, but there are for me several reasons to use legacy lenses even though i have AF covered with lenses from 10mm through 400mm, and the range from 28-200mm is at F2.8.
- as some have pointed out, there are some great 50/1.4 lenses out there at a relatively good price, but this can extend across the whole range of focal lengths, there are some really good and inexpensive legacy lenses available
- i have some lenses that cannot be easily replaced, such as my 300/4 coupled with my SMC AF 1.7x converter, for a 500mm range limited AF lens that weighs about 1 kilo,, or my tamron 200-500/5.6 zoom. any 500mm F5.6 lens in AF is thousands of dollars!
- lastly THEY ARE FUN TO USE and when i am on my own time, i like to slow down and legacy lenses even with alkl their faults, and quirks, are a pleasure to use. i shoot them just for that purpose
Forum: Troubleshooting and Beginner Help 08-30-2019, 06:39 AM  
Shake Reduction performance depending of shutter speed. Question
Posted By Lowell Goudge
Replies: 14
Views: 747
i think later bodies are better than the first bodies in that respect, not sure the cut in of the Shake Reduction II with 5 axis that included rotation and yaw as well as x//y/z movements,

before this, using your face (literally) as a contact point with the camera was crucial to resist rotation from pressing the shutter button.
Forum: Post Your Photos! 08-29-2019, 03:51 AM  
Nature Pentax K-3 II Mounted with Tamron 70-200MM 2.8 Macro (Redbellied Woodpecker in Flight
Posted By Lowell Goudge
Replies: 2
Views: 242
You have posted a ton of shots as you have worked on your technique, but I think I like this one the best
Forum: Troubleshooting and Beginner Help 08-29-2019, 03:45 AM  
Shake Reduction performance depending of shutter speed. Question
Posted By Lowell Goudge
Replies: 14
Views: 747
Shake reduction rewards technique.

You should not stop breathing, but you should breath slowly and I believe be exhaling slightly when you shoot, it is the same technique when target shooting or using a rifle



The biggest challenge to overcome is the tendency to rotate or move the camera when pressing the shutter.



When holding your camera I find it best to Do the following
-You take a relaxed posture, support your camera the best you can, stand with your feet apart to make your body as stable as possible, etc.
- your arms above the elbow, should come against your body if possible, to minimize the length of your arms unsupported,
- to hold the camera, have one hand on the grip (this is the hand to press the shutter), the other hand as far away from the first as possible, (for long lenses, at the end of the lens) and the camera against your eye/cheek.


I have shot with a 500 mm lens at 1/40

just how good is the K7 shake reduction? - PentaxForums.com
Forum: Post Your Photos! 08-26-2019, 05:33 PM  
Machinery Ruby Red
Posted By Lowell Goudge
Replies: 5
Views: 260
Gm upsells the color, you can only get red if you purchase specific option packages, at least that’s how it was when my father in law bought is last red Chevy a few years back
Forum: Photographic Industry and Professionals 08-26-2019, 05:29 PM  
Selling a digital photograph
Posted By Lowell Goudge
Replies: 29
Views: 1,094
You never know, I would check both designer, and owner (some cities have their skyline protected as branding I.e a trade mark.

All Iím saying is he should check first.
Forum: Troubleshooting and Beginner Help 08-26-2019, 05:02 PM  
Failed screw drive on Pentax K-10.
Posted By Lowell Goudge
Replies: 12
Views: 505
On my K10 the lens locking pin stayed retracted, the same mechanism holds the screw drive disengaged. My M42;adaptor has been permanently attached ever since, about 5 years now
Forum: Pentax Camera and Field Accessories 08-25-2019, 09:02 AM  
A better Car window mount ?
Posted By Lowell Goudge
Replies: 35
Views: 1,047
Have you looked at the clamp on this lens support?
https://www.bhphotovideo.com/c/product/554349-REG/Manfrotto_359_359_Long_Len...D_BwE&pcur=CAD

You bcan attach anything to the clamp that goes around the tripod leg
Forum: Pentax SLR Lens Discussion 08-25-2019, 07:16 AM  
lens light-gathering abilities
Posted By Lowell Goudge
Replies: 284
Views: 6,404
If you consider how proofs are done in calculus, you will find that most differential equation solutions are based upon straight line solutions as curves are eventually considered in the limit as distance approaches 0 as straight lines. Therefore I think you could prove that the flat earth is just the earth as seen as the viewing distance approaches zero:lol:
Forum: Lens Sample Photo Archive 08-25-2019, 04:25 AM  
Pentax DA* 200 f/2.8
Posted By Lowell Goudge
Replies: 22
Views: 6,823
A duplicate entry was started for this lens, you can find the images here

Pentax KP with Pentax DA* 200mm f/2.8 ED (IF) SDM - Sample - PentaxForums.com
Forum: Lens Sample Photo Archive 08-25-2019, 04:22 AM  
Pentax KP with Pentax DA* 200mm f/2.8 ED (IF) SDM - Sample
Posted By Lowell Goudge
Replies: 7
Views: 657
I have marked this in the index, as a duplicate entry. You can leave the thread just stop posting in it please.
Forum: Photographic Industry and Professionals 08-25-2019, 04:08 AM  
Selling a digital photograph
Posted By Lowell Goudge
Replies: 29
Views: 1,094
You still may need a release.

Just as trade marks are copyrighted, and let’s say you have a Coke sign prominently in your shot, you may need a release from Coke to make use of the image, in that way it is no different than a model release. You can’t sell the photo without it.

I think there have been a few cases like that already in the courts.
Forum: General Photography 08-24-2019, 06:03 AM  
What's in a Name, or Why don't all PF Members post their images along with titles?
Posted By Lowell Goudge
Replies: 55
Views: 1,912
Many of the images in the post your photos forum I assume the thread title is what the OP imagined as the image title, look, for example at the images posted by kerrowdown.

For many of us, i suspect that putting a title is perhaps comparable to assuming that what we are doing is somehow suggesting our images are fine art. And perhaps in that respect might make one feel a little arrogant,

I think it is different if you are in the business, and trying to actively sell images, but I am not, so I don’t. If I post images into it for fun and don’t take myself too seriously.
Forum: Photographic Industry and Professionals 08-24-2019, 05:52 AM  
Selling a digital photograph
Posted By Lowell Goudge
Replies: 29
Views: 1,094
I think before the OP does anything, he needs to ensure that there are no existing copyrights on the bridge, by the architect or designers and design firm.

This type of design usually has some form of protection for design and it would be unfortunate to get caught by accident. It would not be an issue if the bridge was simply in the background, but it seems like it is the sole subject, and therefore requires such a check.
Forum: Troubleshooting and Beginner Help 08-24-2019, 05:46 AM  
Pentax K50 aperture block
Posted By Lowell Goudge
Replies: 4
Views: 453
For my daughters K50 which failed this spring, I called Ricoh-Pentax Canada to discover much to my dismay, they no longer do the warranty work themselves, and that yes sun camera does the work. When I pressed them on the issue, advising that it was a well documented issue with the camera, and it should be covered under warranty, they asked me to produce the press announcement proving this. They will not acknowledge it is an issue. They also said I should phone the credit card company I used for purchase, to get them to cover the warranty repair. For $200+ on a $329 body, it seems too much. It may become a manual lens body, as there is nothing wrong with function other than the intermediate aperture control.

My daughters camera sat for a while before it failed, I wonder if there is a relationship?
Forum: General Photography 08-13-2019, 07:28 PM  
Does greater sensor "real estate" equate to better image quality?
Posted By Lowell Goudge
Replies: 107
Views: 3,244
The issue regardless of film or digital is that you are enlarging both, but until the enlargement exceeds the display resolution, such that you can individually inspect each pixel, on your monitor, or each grain of silver halide on the film , perhaps my standing a foot away from a slide projected on a 4 foot screen You are looking at the composite image of multiple pixels or grains, the consistency between adjacent grains / pixels is what is evaluated as quality
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