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Forum: Product Suggestions and Feedback 07-01-2020, 09:21 PM  
Pentax 70mm HD Limited vs the cheaper SMC version
Posted By Fogel70
Replies: 6
Views: 363
It is probably difficult to get hold of new lenses in SMC version as they are no longer manufactured. The HD version has replaced SMC version.
Forum: Pentax Film SLR Discussion 05-27-2020, 11:42 PM  
Update your Pentax SLR to a DSLR?
Posted By Fogel70
Replies: 16
Views: 1,001
It is kind of an interesting concept, but other than that it is not much for me. It is more like a cool gadget, but probably not someone would use very much.

The concept is that instead of film there is a focusing screen that the image is projected on, then on the back there is a camera in the bottom of the tube with a 45 degree mirror on the top that capture the image of the focusing screen.
But the usability looks to be a nightmare, no where near like using an old film camera with film.
Forum: General Talk 05-13-2020, 05:47 AM  
Coronavirus
Posted By Fogel70
Replies: 4,099
Views: 101,299
US may also be in an ealier phase of the pandemic (at least parts of the country). Spain and Italy had their peaks in fatalities in second half of March, while US peak seems to have lasted through all of April. Not surprisngly, as US is a much larger country, so it takes longer for the pandemic to spread through the country.

Same with daily new cases. Spain and Italy have had 6-8 weeks of decline in new cases, but in US the decline has just started to show.
Forum: General Talk 05-12-2020, 01:47 AM  
Coronavirus
Posted By Fogel70
Replies: 4,099
Views: 101,299
It may be times when this type of analysis work, but it does not really work during a pandemic.

During a pandemic one of the most important things is to keep helth care system from being overburdend, so one high priority goal is to protect elderly from being infected as it is the elderly that gets most sick from the virus, and thus put most pressure on the health care system. In the younger population it is few that need health care, but if not protecting the elderly it may be many of the yonger asympomatic people that infect the elderly.

If the health care system would get overburdened, then it could be situations like you talk about. But during a pandemic all efforts are made to flatten the curve for avoiding this to happen.
Forum: General Talk 05-11-2020, 09:37 PM  
Coronavirus
Posted By Fogel70
Replies: 4,099
Views: 101,299
There are many more factors to account for. A 80 year old citizen have a much higher risk of dying from the virus. A 80+ year old citizen has maybe 15% risk of dying if getting infected, A 10 year old have less than 0.1% risk of dying if getting infected. So for every 10 year old dying it could be hundreds or thousands of 80+ year olds dying.

Which is also happening in most places. Death rate is highly dominated by 70+ year old people dying.

FI looking at the Swedish statistics. There are 3256 dead in total
1 of them is in the age group of 19 years or younger
52 of them are in the age group of 49 years or younger
2862 are from the age group of 70 years or older

So by your calculation it could have been 17172 years lost in the 70+ age group, and 71 years lost in the 19- age group.

Here is some data on fatality rated by age group.
https://ourworldindata.org/mortality-risk-covid#case-fatality-rate-of-covid-19-by-age
Forum: General Talk 05-04-2020, 03:44 AM  
Coronavirus
Posted By Fogel70
Replies: 4,099
Views: 101,299
The trending down in Georgia may at least partly be because of delay in testing/reporting.

They also indicate that on the graphs with a 14-day window. The start of the 14 day window is on the peak of the graph.


It may also depend on how the data is registered. This is how Georgia register the data, but I'm not sure all places do the same.
Forum: General Talk 05-03-2020, 08:30 AM  
Coronavirus
Posted By Fogel70
Replies: 4,099
Views: 101,299
The problem is that the number of serously sick of covid-19 must be in control so the health care system is not overloaded. If the hospitals gets overloaded it is not just people with covid-19 that are affected. Any person needing medical care for any serious reason could die as they have to wait too long before getting medical care. So when opening up communites, it has be done in baby steps so the spread of the virus can be kept under control with testing. There is also a delay in testing/reporting, so it may take 1-2 weeks before you see the first effect of opening up the restrictions.

Or igonre to treat most covid-19 cases that need medical care. Just let them die at home and have the families take care of the deceased.
Forum: General Talk 04-30-2020, 08:28 PM  
Coronavirus
Posted By Fogel70
Replies: 4,099
Views: 101,299
From what I have read, there are few people with no underlying condition that get serious ill and have to be taken to hospital.
More than 94% of people in below study had at least one underlying conditions. The most common underlying conditions was, high blood pressure, severe obesity and diabetes.

Nearly all coronavirus patients at Northwell Health had underlying condition: study
Forum: General Talk 04-30-2020, 06:42 AM  
Coronavirus
Posted By Fogel70
Replies: 4,099
Views: 101,299
It is most likely much more the 5-6 month they try to shave off. Some say that 18 month is already too optimistic.
Many of vaccines for recent pandemics have taken years to develop as each testing phase needs to be monitored for for a long time before it is safe to assume no reaction will come from the test subjects.

Doing it in less than a year means that each testing phase only gets a few months, which is no where long enough for safety.
FI the narcolepsy cases I mentioned earlier took in average 8 month to develop after vaccination.

Covid-19 vaccine in 18 months? Experts are skeptical. - CNN
Forum: Pentax SLR Lens Discussion 04-30-2020, 01:22 AM  
Fixing a jamming focusing ring on an FA 100mm Macro?
Posted By Fogel70
Replies: 3
Views: 401
It is not just the focus range limiter that is activated?
I believe the limiter is at 2 feet.

Assuming that it is the FA 100/2.8 macro.
https://www.pentaxforums.com/lensreviews/SMC-Pentax-FA-100mm-F2.8-Macro-Lens.html
Forum: General Talk 04-29-2020, 09:26 PM  
Coronavirus
Posted By Fogel70
Replies: 4,099
Views: 101,299
This sounds dangerous, but for high risk groups it may save lives even though the vaccine is not fully proven.

But for the general population in low risk groups an unproven vaccine may pose a bigger risk than the virus itself.
If government does not want to take liability for any side effects of the vaccine, I would not be interested in taking it (unless I was in a high risk group).


it was not long ago a vaccine for swine flu was introduced in Europe, caused narcolepsy mainly among children and young adults. This vaccine was later withdrawn from the market.
We may Finally Know why a Flu Vaccine Triggered Narcolepsy | IFLScience

These people could at least get some economic compensation, when they got their lifes ruined.
Forum: Pentax DSLR Discussion 04-29-2020, 04:24 PM  
external battery pack for KX?
Posted By Fogel70
Replies: 8
Views: 448
Using 5V should not be a problem.
Rechargable AA are 1.2V so K-X run fine on 4.8V.
Forum: General Talk 04-29-2020, 06:49 AM  
Coronavirus
Posted By Fogel70
Replies: 4,099
Views: 101,299
Saw some eye opening, and sad statistics about mortality rate on Swedish covid-19 cases.

Of all the death in Sweden, 85% are in the age group of 70+.
In the 70+ age group the moratlity rate are in average 30%, at least 100x higher than in the age group of 30 and younger.

So successful protection of the elderly can make a huge difference.
Forum: General Talk 04-28-2020, 08:30 PM  
Coronavirus
Posted By Fogel70
Replies: 4,099
Views: 101,299
The isolation of elderly and sick seems to have failed in most places. With lots of death coming from this group, but only death from hospitals may be included in the official statistics.

People working in nursing homes may not have equipment or training for handling something like this, and rhey have not been prioritized for getting PPE and testing.

Inside UK care homes: why the system is failing its coronavirus test | Financial Times
Forum: General Talk 04-27-2020, 05:51 AM  
Coronavirus
Posted By Fogel70
Replies: 4,099
Views: 101,299
Average population density per country does not really matter unless the population is spread evenly over to whole country. The local population density where people live does matter, but also the number of contacts from abroad.
Which is why areas close to international airports has suffered worst

South Korea was quick to act which is the main reason for their success. So they where able to contain the spread without having to do a huge number of tests.

Once the virus start to spread wide it is difficult to perform enought test to control the spread. To be able to perform enough tests then you first need to increase the capacity of testing, which takes time, or invent new testing that are not limited by the labs. Here is one exple of a cheap and quick test that are not limited by lab equipment. It looks to have the potential of a DIY test.
New diagnostic test for COVID-19 may deliver results within half an hour | Karolinska Institutet Nyheter
Forum: General Talk 04-27-2020, 02:26 AM  
Coronavirus
Posted By Fogel70
Replies: 4,099
Views: 101,299
Yes, and it is why it is mainy high populated cities that are affected. (that have international contacts through airports).

And the population density difference between Sweden and US do not say much as there are so much unpopulated areas in both countries. Sweden just have more unpopulated percentage of the country.
But it is probably a larger part of the Swedish population that live in highly poplulated cities, than US population.
Forum: General Talk 04-26-2020, 11:46 PM  
Coronavirus
Posted By Fogel70
Replies: 4,099
Views: 101,299
You cannot really compare two countries as they are different.

But there are also similarities between US and Sweden. The mayor outbreak is in the largest city/state in the countries. New York and Stockholm, where New York has been hit much harder (higher per million death rate) than Stockholm, but Stockolm has 15% of the Swedish population where New York has 6% of the US population. So the lower per million death rate in Stockholm has a higher effect on per-capita death rate in Sweden. The effect on rural population in both US and Sweden is very low, but they may be hit harder later during the pandemic.

Sweden has not seen the same massunemployment as US yet, but as a small country it can not do much about the effect of the coronavirus recession to come.
Forum: General Photography 04-22-2020, 06:18 AM  
A time for Self Portraits?
Posted By Fogel70
Replies: 4
Views: 535
Most people would probably prefer portraits of a genuine homeless bum. Now it is just the way I look. ;)
Forum: General Photography 04-03-2020, 12:04 AM  
April Fools - Pentax D FA 35mm f1.4 may be down the pipeline??
Posted By Fogel70
Replies: 14
Views: 1,104
Even if Pentax had announced this lens we could not have used it, as K-mount was not among compatible mounts. ;)
Forum: Ricoh GR 03-27-2020, 08:55 PM  
Hot shoe adapter for GPS geotagging?
Posted By Fogel70
Replies: 5
Views: 559
I believe the most used method of geotag is to use software on the computer that merge position data from smartphone with images from your camera. An app on your smartphone to log positions that you later merge with you photos.

There are many different softwares for this. FI plugins for lightroom, and some of the can use already existing geotag data from your smartphone, FI google "my places" data that may exist for several years back. As I have GPS in my camera I do not use this, so I have no recomendation on which software to use.
Forum: Pentax KP 03-19-2020, 03:38 AM  
Exposure bar in live view of KP
Posted By Fogel70
Replies: 9
Views: 657
Now I realize I was wrong yesterday.
Not sure what I did wrong, but now when I'm i manual mode and use live view I get both the exposure bar and live histogram.
Forum: Pentax KP 03-18-2020, 07:23 AM  
Exposure bar in live view of KP
Posted By Fogel70
Replies: 9
Views: 657
I do not have this on my K3 II either, but there is an option for live histogram instead.
Live histogram is a more powerful aid but can take some practise ro master.
Forum: General Photography 03-07-2020, 10:34 AM  
An important eye test
Posted By Fogel70
Replies: 21
Views: 1,487
I see zero number in "need more cameras" so I think I'm safe..
Forum: Pentax SLR Lens Discussion 03-06-2020, 10:22 PM  
SMCP-DA 21mm f3.2 vs HD DA 21mm F3.2
Posted By Fogel70
Replies: 17
Views: 1,182
Optically improved = New HD coating. Reducing ghosting and flare.
Rounded aperture blades can probably also be seen as an optical improvement.
Forum: Pentax SLR Lens Discussion 03-01-2020, 09:20 PM  
SMCP-DA 21mm f3.2 vs HD DA 21mm F3.2
Posted By Fogel70
Replies: 17
Views: 1,182
I really doubt that any of them sell the SMC version, as it has not been manufactured in several years.
It is prabably just an error in the description from Adorama, or that they still use the image of the SMC version with green ring.
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