Author Topic: SB-21 Adapter rings question? necessary?  (Read 1461 times)

jamesmustain

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SB-21 Adapter rings question? necessary?
« on: February 19, 2021, 05:52:36 »
What makes the Shark model NV360 the best vacuum for a better home environment?

Vacuum cleaner is an increasingly widely used cleaning tool. Currently, not only does this machine bring cleanliness to the living space, it also has more health benefits than many others can offer. One of those benefits is the reduction of small elements in the air that can cause allergies in humans. Shark is a famous vacuum cleaner brand in the world, and it has come up with an advanced technology with great health effects, which is Anti-Allergen Complete Seal Technology coupled with HEPA filter. Currently, this technique is applied a lot on its models, and one of the models that attracted many interested is the Shark navigator lift away deluxe NV360 vacuum.

HEPA filter

Most people know that the main use of a vacuum cleaner is to suck dust and dirt from the air, put it through a filter and contain it in a dust canister or bag. Nowadays, one of the best and most widely applied filters is the HEPA filter. This filter can remove up to 99.97% of harmful particles in the air as small as 0.3 microns. For this size, most types of allergens, as well as other diseases of the respiratory tract, are thoroughly filtered. This is a must-have function of a vacuum cleaner for people with asthma or allergies. Even for those who do not have the above diseases, this filter is recommended for use due to its benefits for a fresh environment and healthy life. Moreover, the lifespan of HEPA filters on Shark model NV360 is up to 2 years. Therefore, this machine can run for a very long time until you have to replace the filter.



Anti-Allergen Complete Seal Technology

Shark navigator NV360 is one of Shark's models that apply this technique. You will wonder, why even have a HEPA filter and still need Anti-Allergen Complete Seal Technology? Well, due to a long time with commercials that may mislead you, this is a secret that many vacuum cleaner companies will ignore or do not make clear. When dirt and dust are sucked into the machine, without being completely sealed, dirt and dust will easily leak out of the vacuum before reaching the HEPA filter. So, you can imagine that even if the machine has a HEPA filter without this technique, your filter will be almost 899 and will become meaningless.

With Anti-Allergen Complete Seal Technology, you will no longer have to worry about allergies leaking out of your device and escaping into the surrounding air. If you've ever used a vacuum cleaner without this feature, or your machine has a white fog around it while in use, there is a high chance that you should give up that machine to get yourself a new one which has Anti- Allergen Complete Seal Technology like Shark model NV360.



Final thoughts

HEPA filter and Anti-Allergen Complete Seal Technology should always go hand in hand. While the HEPA filter is a very good filter, without the seal feature, it becomes almost useless. Shark vacuums possess this perfect combination. If you are a person with asthma or allergies, or you care about the health of yourself and your loved ones, try out Shark vacuum NV360 for the best experience.

Birna Rørslett

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Re: SB-21 Adapter rings question? necessary?
« Reply #1 on: February 19, 2021, 09:07:23 »
No, not mandatory, but the correct rings ensure the SB-21 flash head is seated securely and firmly to the lens.

Step rings have a less efficient form factor to hold the SB-21. But using them is doable, with some precautions.

David H. Hartman

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Re: SB-21 Adapter rings question? necessary?
« Reply #2 on: February 21, 2021, 01:12:52 »
These Nikon Speedlight manuals downloadable from Nikon Canada might be helpful...

https://cdn-10.nikon-cdn.com/pdf/manuals/archive/SB-21.pdf

Scroll down half way for the beginning of the English section of the SB-21 Manual.

https://cdn-10.nikon-cdn.com/pdf/manuals/Speedlights/SB-29.pdf

Also if the lens you wish to use the SB-21 with is an AF or AF-D 60/2.8 Micro-Nikkor a Nikon Adapter UR-3 is available new from B&H Photo USA on special order for $30.00 (USD). The Nikon UR-3 should be available from other suppliers and in various countries.

Perhaps something here will help,

Dave
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